Last data update: Nov 22, 2024. (Total: 48197 publications since 2009)
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Nationwide introduction of HPV vaccine in Zimbabwe 2018-2019: experiences with multiple cohort vaccination delivery
Carlton JG , Marembo J , Manangazira P , Rupfutse M , Shearley A , Makwabarara E , Hidle A , Loharikar A . PLoS Glob Public Health 2022 2 (4) e0000101 The World Health Organization (WHO) recommends the human papillomavirus (HPV) vaccine for girls aged 9-14 years for cervical cancer prevention and encourages vaccinating multiple cohorts in the first year to maximize impact. The HPV vaccine was introduced nationwide in Zimbabwe in 2018 through a 1-week school-based campaign to multiple cohorts (all girls 10-14 years old), followed by a single cohort (grade 5 girls in school and age 10 girls out-of-school) in 2019. During the 2019 campaign, the multiple cohort's second dose was concurrently delivered with the single cohort's first dose. We interviewed national-level key informants, reviewed written materials, and observed vaccination sessions to document HPV vaccine introduction in Zimbabwe and identify best practices and challenges. Key informants included focal persons from government health and education ministries, in-country immunization partners, and HPV Vaccine Strategic Advisory Group members. We conducted a desk review of policy/strategy documents, introduction plans, readiness reports, presentations, and implementation tools. Vaccination sessions were observed in three provinces during the 2019 campaign. Key informants (n = 8) identified high cervical cancer burden, political will, vaccine availability, donor financing, and a successful pilot program as factors driving the decision to introduce the HPV vaccine nationally. The school-based delivery strategy was well accepted, with strong collaboration between health and education sectors and high community demand for vaccine identified as key contributors to this success. Challenges with transitioning from a multiple age-based to single grade- and age-based target population as well as funding shortages for operational costs were reported. Zimbabwe's first multiple cohort, school-based HPV vaccination campaign was considered successful-primarily due to strong collaboration between health and education sectors and political commitment; however, challenges vaccinating overlapping cohorts in the 2019 campaign were observed. Integration with existing health and vaccination activities and continued resource mobilization will ensure sustainability of Zimbabwe's HPV vaccination program in the future. |
Feasibility and acceptability of nationwide HPV vaccine introduction in Senegal: findings from community-level cross-sectional surveys, 2020
Doshi RH , Casey RM , Adrien N , Ndiaye A , Brennan T , Roka JL , Bathily A , Ndiaye C , Li AnYie , Garon J , Badiane O , Diallo A , Loharikar A . PLoS Glob Public Health 2022 2 (4) e0000130 In Senegal, cervical cancer is the most common cancer among women and the leading cause of morbidity and mortality from all cancers. In 2018, Senegal launched a national human papillomavirus (HPV) vaccination program with Gavi, the Vaccine Alliance (Gavi), support. HPV vaccination was incorporated into the national immunization program as a two-dose schedule, with a 6-12-month interval, to nine-year-old girls via routine immunization (RI) services at health facilities, schools and community outreach services throughout the year. During February to March 2020, we conducted interviews to assess the awareness, feasibility, and acceptability of the HPV vaccination program with a cross-sectional convenience sample of healthcare workers (HCWs), school personnel, community healthcare workers (cHCWs), parents, and community leaders from 77 rural and urban health facility catchment areas. Participants were asked questions on HPV vaccine knowledge, delivery, training, and community acceptability of the program. We conducted a descriptive analysis stratified by respondent type. Data were collected from 465 individuals: 77 HCW, 78 school personnel, 78 cHCWs, 152 parents, and community leaders. The majority of HCWs (83.1%) and cHCWs (74.4%) and school personnel (57.7%) attended a training on HPV vaccine before program launch. Of all respondents, most (52.5-87.2%) were able to correctly identify the target population. The majority of respondents (60.2-77.5%) felt that the vaccine was very accepted or accepted in the community. Senegal's HPV vaccine introduction program, among the first national programs in the African region, was accepted by community stakeholders. Training rates were high, and most respondents identified the target population correctly. However, continued technical support is needed for the integration of HPV vaccination as a RI activity for this non-traditional age group. The Senegal experience can be a useful resource for countries planning to introduce the HPV vaccine. |
Cost of human papillomavirus vaccine delivery at district and health facility levels in Zimbabwe: A school-based vaccination program targeting multiple cohorts
Hidle A , Brennan T , Garon J , An Q , Loharikar A , Marembo J , Manangazira P , Mejia N , Abimbola T . Vaccine 2022 40 Suppl 1 A67-A76 BACKGROUND: After a pilot project in 2014-15 Zimbabwe introduced the human papillomavirus (HPV) vaccine nationally in 2018 for girls aged 10-14years through a primarily school-based vaccination campaign with two doses administered at 12-month intervals. In 2019, a first dose was delivered to a new cohort of girls in grade 5 of girls age 10years if out-of-school (OOS), along with a second dose to the 2018 multiple cohorts. Additional effort was made to identify and mobilize OOS girls by Village Health Workers (VHWs) in the community. Zimbabwe reported 1,569,905 doses of HPV vaccine administered during the 2018 and 2019 campaigns. This analysis evaluated the cost of Zimbabwe's national HPV vaccine introduction. METHODS: A retrospective, incremental, ingredients-based cost analysis from the provider perspective was conducted in 2018 and 2019. Financial and economic cost data were collected at district and health facility levels using a two-stage cluster sampling approach and four cost dimensions: program activity, resource input, payer, and administrative level. Costs are presented in 2020 US$ in total and per dose. RESULTS: The total weighted costs for combined district and health facility administrative levels were US$ 828,731 (financial) and US$ 2,060,943 (economic). For service delivery, the total weighted cost per dose was US$ 0.16 (financial) and US$ 0.59 (economic). The program activities with the largest share of total weighted financial cost were training (37% of total) and service delivery (30%), while the largest shares of total weighted economic costs were service delivery (45%) and training (19%). Efforts by VHWs to reach OOS girls resulted in an additional US$ 2.99 in financial cost per dose and US$ 7.79 in economic cost per dose. CONCLUSION: The service delivery cost per dose was lower than that documented in the pilot program cost analysis in Zimbabwe and studies elsewhere, reflecting a campaign delivery approach that spread fixed costs over a large vaccination cohort. The additional cost of reaching OOS girls with the HPV vaccine was documented for the first time in low- and middle-income countries, which may provide information on potential costs for other countries. |
Cost of human papillomavirus vaccine delivery in a single-age cohort, routine-based vaccination program in Senegal
Brennan T , Hidle A , Doshi RH , An Q , Loharikar A , Casey R , Badiane O , Ndiaye A , Diallo A , Loko Roka J , Mejia N , Abimbola T . Vaccine 2021 40 Suppl 1 A77-A84 INTRODUCTION: In 2018, Senegal introduced human papillomavirus (HPV) vaccine into its routine immunization program for all nine-year-old girls nationwide. We evaluated the costs of Senegal's introduction of HPV vaccine via this delivery approach. METHODS: We conducted a retrospective, incremental, ingredients-based cost evaluation from the provider perspective. The study timeframe included Senegal's first planning meeting in 2018 through data collection in early 2020. We collected costs from all involved units at the national and regional levels. A multi-stage cluster sampling approach was used to obtain a nationally representative sample of districts and health facilities. Weights were applied to costs from sampled units to estimate costs across all units. The cost evaluation was based on four dimensions: program activity, resource input, payer, and administrative level. Total costs were divided by the number of HPV doses administered to determine cost per dose and per dimension. RESULTS: Excluding vaccine program activity costs, the total financial and economic delivery costs of Senegal's HPV vaccination program were US$ 1,152,351 and US$ 2,838,466, respectively (US$ 3.07 and US$ 7.56 per dose, respectively). A total of 375,608 HPV vaccine doses were administered during the cost evaluation. Training and per diem represented the largest shares of financial costs. Service delivery and personnel time accounted for the largest shares of economic costs. By administrative level, district and health facility levels had the largest shares of financial and economic costs, respectively. Senegal's Ministry of Health accounted for the largest share of financial and economic costs. Including vaccine program activity costs (US$ 4.68/per dose), the total financial cost was US$ 2,911,343 (US$ 7.75 per dose). CONCLUSION: This cost evaluation can support Senegal's future vaccine introductions and inform other countries planning to introduce HPV vaccine nationwide. These findings support previous costing studies which anticipated potential economies of scale during the transition from HPV vaccine pilot demonstration projects to national introduction. |
National introduction of HPV vaccination in Senegal-Successes, challenges, and lessons learned
Casey RM , Adrien N , Badiane O , Diallo A , Loko Roka J , Brennan T , Doshi R , Garon J , Loharikar A . Vaccine 2021 40 Suppl 1 A10-A16 Following successful school-based demonstration programs in 2014-2016, the human papillomavirus (HPV) vaccine was introduced nationwide in Senegal for 9-year-old girls in 2018, using a routine service delivery strategy at health facilities, schools, and other outreach sites. We reviewed the HPV vaccine introduction in Senegal to understand the successes, challenges, and lessons learned. Focusing on three key domains (program decision-making, planning, and implementation), we conducted ten semi-structured interviews during 2019-2020 with purposively selected national-level stakeholders (government, expert advisory committee, key technical and implementation partners) and comprehensive desk reviews of country documents on HPV vaccine introduction. Due to the global HPV vaccine shortage, the introduction was limited to a single-age cohort; therefore, 9-year-old girls were chosen. This strategy enabled Senegal to potentially reach more girls in primary education because school enrolment rates decline thereafter. Vaccination through routine delivery platforms (i.e., health facility, school-based, and community outreach) was perceived to be more cost-effective than a campaign approach. High-level political commitment and collaborations between immunization and education partners were frequently cited by key informants as reasons for a successful vaccine introduction. All key informants reported that the health care worker (HCW) strike, rumors, and vaccine hesitancy negatively impacted the introduction. Other challenges noted included insufficient information on attitudes towards HPV vaccination among HCWs, teachers, and community members. Senegal successfully introduced HPV vaccine into the national immunization schedule, using a routine delivery strategy. Strong leadership and a multi-sectoral approach likely contributed to this success. To build sustainability of the HPV vaccination program in the future, it is important to improve the understanding and engagement among all stakeholders, including HCWs and community members, and to strengthen and innovate communication and crisis management strategies. To better understand the efficiency and effectiveness of Senegal's vaccination strategy, additional assessments of the operational costs and coverage achieved are needed. |
Human papillomavirus (HPV) vaccine introduction in Sikkim state: Best practices from the first statewide multiple-age cohort HPV vaccine introduction in India-2018-2019
Ahmed D , VanderEnde K , Harvey P , Bhatnagar P , Kaur N , Roy S , Singh N , Denzongpa P , Haldar P , Loharikar A . Vaccine 2021 40 Suppl 1 A17-A25 BACKGROUND: Cervical cancer is a leading cause of cancer-associated mortality among women in India, with 96,922 new cases and 60,078 deaths each year, almost one-fifth of the global burden. In 2018, Sikkim state in India introduced human papillomavirus (HPV) vaccine for 9-13-year-old girls, primarily through school-based vaccination, targeting approximately 25,000 girls. We documented the program's decision-making and implementation processes. METHODS: We conducted a post-introduction evaluation in 2019, concurrent with the second dose campaign, by interviewing key stakeholders (state, district, and local level), reviewing planning documents, and observing cold chain sites in two purposefully-sampled community areas in each of the four districts of Sikkim. Using standard questionnaires, we interviewed health and education officials, school personnel, health workers, community leaders, and age-eligible girls on program decision-making, planning, training, vaccine delivery, logistics, and communication. RESULTS: We conducted 279 interviews and 29 observations in eight community areas across four districts of Sikkim. Based on reported administrative data, Sikkim achieved >95% HPV vaccination coverage among targeted girls for both doses via two campaigns; no severe adverse events were reported. HPV vaccination was well accepted by all stakeholders; minimal refusal was reported. Factors identified for successful vaccine introduction included strong political commitment, statewide mandatory school enrollment, collaboration between health and education departments at all levels, and robust social mobilization strategies. CONCLUSIONS: Sikkim successfully introduced the HPV vaccine to multiple-age cohorts of girls via school-based vaccination, demonstrating a model that could be replicated in other regions in India or similar low- and middle-income country settings. |
Tanzania's human papillomavirus (HPV) vaccination program: Community awareness, feasibility, and acceptability of a national HPV vaccination program, 2019
Li AJ , Manzi F , Kyesi F , Makame Y , Mwengee W , Fleming M , Mkopi A , Mmbaga S , Lyimo D , Loharikar A . Vaccine 2021 40 Suppl 1 A38-A48 BACKGROUND: In April 2018, Tanzania introduced the human papillomavirus (HPV) vaccine nationally to 14-year-old girls, utilizing routine delivery strategies (i.e. vaccinating girls at health facilities and community outreach, including schools). We sought to assess awareness, feasibility, and acceptability of the HPV vaccination program among health workers and community-level stakeholders. METHODS: We conducted cross-sectional in-person surveys among health workers, school personnel, community leaders, and council leaders in 18 council areas across six regions of Tanzania in October-November 2019. Regions were purposively selected to provide demographic, geographic, and vaccination coverage variability; sub-regional levels used random or stratified random sampling. Surveys included questions on HPV vaccine training and knowledge, delivery strategy, target population, and vaccine and program acceptability. Descriptive analysis was completed for all variables stratified by respondent groups. RESULTS: Across the 18 councils, there were 461 respondents, including health workers (165), school personnel (135), community leaders (143), and council leaders (18). Over half of each respondent group (50-78%) attended a training or orientation on HPV vaccine. Almost 75% of the health workers and school personnel respondent groups, and less than half (45%) of community leaders correctly identified the target age group for HPV vaccine. Most (80%) of the health workers indicated HPV vaccination was available at health facilities and schools; most (79%) indicated that the majority of girls receive HPV vaccine in school. Approximately half (52%) of all respondents reported hearing misinformation about HPV vaccine, but 97% of all respondents indicated that HPV vaccine was either "very accepted" or "somewhat accepted" in their community. CONCLUSION: The HPV vaccination program in Tanzania was well accepted by community stakeholders in 18 councils; adequate knowledge of HPV vaccine and the HPV vaccination program was demonstrated by health workers and school personnel. However, continued technical support for integration of HPV vaccination as a routine immunization activity and reinforcement of basic knowledge about HPV vaccine in specific community groups is needed. The Tanzania experience provides an example of how this vaccine can be integrated into routine immunization delivery strategies and can be a useful resource for countries planning to introduce HPV vaccine as well as informing global partners on how to best support to countries in operationalizing their HPV vaccine introduction plans. |
Multiple cohort HPV vaccination in Zimbabwe: 2018-2019 program feasibility, awareness, and acceptability among health, education, and community stakeholders
Garon JR , Mukavhi A , Rupfutse M , Bright S , Brennan T , Manangazira P , An Q , Loharikar A . Vaccine 2021 40 Suppl 1 A30-A37 INTRODUCTION: Zimbabwe introduced human papillomavirus (HPV) vaccine nationally in May 2018, targeting multiple cohorts (girls aged 10-14 years) through a school-based vaccination campaign. One year later, the second dose was administered to the multiple cohorts concurrently with the first dose given to a new single cohort of girls in grade 5. We conducted cross-sectional surveys among health workers, school personnel, and community members to assess feasibility of implementation, training, social mobilization, and community acceptability. METHODS: Thirty districts were selected proportional to the volume of the HPV vaccine doses delivered in 2018; two health facilities were randomly selected within each district. One health worker, school health coordinator, village health worker, and community leader were surveyed at each selected health facility and surrounding area during January-February 2020, using standard questionnaires. Descriptive analysis was completed across groups. RESULTS: There were 221 interviews completed. Over 60% of health workers reported having enough staff to carry out vaccination sessions in schools while maintaining routine vaccination services in health facilities. All school health coordinators felt the HPV vaccine should be delivered in schools in the future. Knowledge of the correct target cohort eligibility decreased from 91% in 2018 to 50% in 2020 among health workers. Understanding of HPV infection and use of HPV vaccine for cervical cancer prevention was above 90% for all respondents. Forty-two percent of respondents reported hearing rumors about the HPV vaccine, primarily regarding infertility and safety. CONCLUSIONS: Findings demonstrate the presence of highly knowledgeable staff at health facilities and schools, strong community acceptance, and a school-based HPV program considered feasible to implement in Zimbabwe. However, misunderstandings regarding target eligibility and rumors persist, which can impact vaccine uptake and coverage. Continued social mobilization efforts to maintain community demand and training on eligibility were recommended. Integration, partnerships, and resource mobilization are also needed to ensure program sustainability. |
National introduction of human papillomavirus (HPV) vaccine in Tanzania: Programmatic decision-making and implementation
Mphuru A , Li AJ , Kyesi F , Mwengee W , Mazige F , Nshunju R , Shayo B , Giattas MR , Loharikar A , Lyimo D . Vaccine 2021 40 Suppl 1 A2-A9 BACKGROUND: Cervical cancer is the leading cause of cancer among women in Tanzania, with approximately 10,000 new cases and 7,000 deaths annually. In April 2018, the Government of Tanzania introduced 2 doses of human papillomavirus (HPV) vaccine nationally to adolescent girls to prevent cervical cancer, following a successful 2-year pilot introduction of the vaccine in the Kilimanjaro Region. METHODS: We interviewed key informants at the national level in Tanzania from February to November 2019, using a semi-structured tool to better understand national decision-making and program implementation. We conducted a comprehensive desk review of HPV vaccine introduction materials and reviewed administrative coverage data. RESULTS: Ten key informants were interviewed from the Ministry of Health, Community Development, Gender, Elderly, and Children, the World Health Organization, and other partners, and HPV vaccine planning documents and administrative coverage data were reviewed during the desk review. Tanzania introduced HPV vaccine to a single-age cohort of 14-year-old girls, with the decision-making process involving the Tanzania Immunization Technical Advisory Group and the national Interagency Coordination Committee. HPV vaccine was integrated into the routine immunization delivery strategy, available at health facilities and through outreach services at community sites, community mobile sites (>10 km from the health facility), and primary and secondary schools. Pre-introduction activities included trainings and microplanning workshops for health workers and school personnel at the national, regional, council, and health facility levels. Over 6,000 health workers and 22,000 school personnel were trained nationwide. Stakeholder and primary health care committee meetings were also conducted at the national level and in each of the regions as part of the advocacy and communication strategy. Administrative coverage of the first dose of HPV vaccine at the end of 2019 was 78%, and second dose coverage was 49%. No adverse events following HPV vaccination were reported to the national level. DISCUSSION: Tanzania successfully introduced HPV vaccine nationally targeting 14-year-old girls, using routine delivery strategies. Continued monitoring of vaccination coverage will be important to ensure full 2-dose vaccination of eligible girls. Tanzania can consider periodic intensified vaccination and targeted social mobilization efforts, as needed. |
Impact of the human papillomavirus (HPV) vaccine supply shortage on Tanzania's national HPV vaccine introduction
Li AJ , Kyesi F , Mwengee W , Mphuru A , Giattas MR , Shayo B , Nshunju R , Lyimo D , Loharikar A . Vaccine 2021 40 Suppl 1 A26-A29 Cervical cancer is the fourth most common cancer among women worldwide, with an estimated 570,000 new cases and over 310,000 deaths from cervical cancer each year [1,2]. Over 87% of all new cases and deaths occur in low- and lower-middle-income countries, largely because routine cervical cancer screening and treatment is not widely available [3]. Incidence of cervical cancer is highest in southern and eastern Africa [4]. The World Health Organization (WHO) recommends human papillomavirus (HPV) vaccination for girls 9–14 years old for the primary prevention of cervical cancer. |
Decision making and implementation of the first public sector introduction of typhoid conjugate vaccine - Navi Mumbai, India, 2018
Date K , Shimpi R , Luby S , N R , Haldar P , Katkar A , Wannemuehler K , Mogasale V , Pallas S , Song D , Kunwar A , Loharikar A , Yewale V , Ahmed D , Horng L , Wilhelm E , Bahl S , Harvey P , Dutta S , Bhatnagar P . Clin Infect Dis 2020 71 S172-s178 BACKGROUND: Typhoid fever prevention and control efforts are critical in an era of rising antimicrobial resistance among typhoid pathogens. India remains one of the highest typhoid disease burden countries, although a highly efficacious typhoid conjugate vaccine (TCV), prequalified by the World Health Organization in 2017, has been available since 2013. In 2018, the Navi Mumbai Municipal Corporation (NMMC) introduced TCV into its immunization program, targeting children aged 9 months to 14 years in 11 of 22 areas (Phase 1 campaign). We describe the decision making, implementation, and delivery costing to inform TCV use in other settings. METHODS: We collected information on the decision making and campaign implementation in addition to administrative coverage from NMMC and partners. We then used a microcosting approach from the local government (NMMC) perspective, using a new Microsoft Excel-based tool to estimate the financial and economic vaccination campaign costs. RESULTS: The planning and implementation of the campaign were led by NMMC with support from multiple partners. A fixed-post campaign was conducted during weekends and public holidays in July-August 2018 which achieved an administrative vaccination coverage of 71% (ranging from 46% in high-income to 92% in low-income areas). Not including vaccine and vaccination supplies, the average financial cost and economic cost per dose of TCV delivery were $0.45 and $1.42, respectively. CONCLUSION: The first public sector TCV campaign was successfully implemented by NMMC, with high administrative coverage in slums and low-income areas. Delivery cost estimates provide important inputs to evaluate the cost-effectiveness and affordability of TCV vaccination through public sector preventive campaigns. |
Community-based household assessment of human papillomavirus (HPV) vaccination coverage and acceptability - HPV vaccine demonstration program, Cambodia - 2017
Garon J , Wuddhika IV , Sreenivasan N , Wannemuehler K , Vutthikol Y , Chhorvann C , Loharikar A . Vaccine 2019 37 (9) 1202-1208 BACKGROUND: In 2017, the Cambodia Ministry of Health introduced human papillomavirus (HPV) vaccine through primarily school-based vaccination targeting 9-year-old girls. Vaccination with a two-dose series of HPV vaccine took place in six districts in two provinces as a demonstration program, to better understand HPV vaccine delivery in Cambodia. METHODS: We conducted a community-based coverage survey using a one-stage sampling design to evaluate dose-specific vaccination coverage among eligible girls (those born in 2007 and residents in the areas targeted by the campaign). The household-level survey also assessed factors associated with vaccine acceptability and communication strategies. Trained data collectors interviewed caregivers and girls using a standard questionnaire; vaccination cards and health facility records were reviewed. RESULTS: Of the 7594 households visited in the two provinces, 315 girls were enrolled in the survey (188 in Siem Reap; 127 in Svay Rieng). Documented two-dose HPV vaccination coverage was 84% (95% confidence interval [CI]: 78-88%) overall [85% (95% CI: 78-90%) in Siem Reap; 82% (95% CI: 73-88%) in Svay Rieng.] Almost all girls (>99%) were reported to be enrolled in school and over 90% of respondents reported receipt of vaccine in school. Knowledge of HPV infection and associated diseases was poor among caregivers and girls; however, 58% of caregivers reported "protection from cervical cancer" as the primary reason for the girl receiving vaccine. No serious adverse events after immunization were reported. CONCLUSIONS: The HPV vaccine demonstration program in Cambodia achieved high two-dose coverage among eligible girls in both provinces targeted for vaccination in 2017, through primarily school-based vaccination. High school enrollment and strong microplanning and coordination were seen throughout the campaign. Cambodia will use lessons learned from this demonstration program to prepare for national introduction of HPV vaccine. |
A vaccine against cervical cancer: Context for the global public health practitioner
Jennings MC , Loharikar A . Glob Health Sci Pract 2018 6 (4) 629-634 Many low- and middle-income countries are moving to introduce HPV vaccine into their national immunization programs. To improve coverage, equity, and sustainability, public health officials and practitioners can use planning and implementation lessons learned, including successful school-based delivery strategies, innovative approaches to reach out-of-school girls, best practices for communication and social mobilization, and integration of services to reduce delivery cost. Policy makers, donors, and global partners should continue to consider ways to drive down costs of vaccine procurement. | eng |
Cluster anxiety-related adverse events following immunization (AEFI): An assessment of reports detected in social media and those identified using an online search engine
Suragh TA , Lamprianou S , MacDonald NE , Loharikar AR , Balakrishnan MR , Benes O , Hyde TB , McNeil MM . Vaccine 2018 36 (40) 5949-5954 BACKGROUND: Adverse events following immunization (AEFI) arising from anxiety have rarely been reported as a cluster(s) in the setting of a mass vaccination program. Reports of clusters of anxiety-related AEFIs are understudied. Social media and the web may be a resource for public health investigators. METHODS: We searched Google and Facebook separately from Atlanta and Geneva to identify reports of cluster anxiety-related AEFIs. We reviewed a sample of reports summarizing year, country/setting, vaccine involved, patient symptoms, clinical management, and impact to vaccination programs. RESULTS: We found 39 reports referring to 18 unique cluster events. Some reports were only found based on the geographic location from where the search was performed. The most common vaccine implicated in reports was human papillomavirus (HPV) vaccine (48.7%). The majority of reports (97.4%) involved children and vaccination programs in school settings or as part of national vaccination campaigns. Five vaccination programs were reportedly halted because of these cluster events. In this study, we identified 18 cluster events that were not published in traditional scientific peer-reviewed literature. CONCLUSIONS: Social media and online search engines are useful resources for identifying reports of cluster anxiety-related AEFIs and the geographic location of the researcher is an important factor to consider when conducting these studies. Solely relying upon traditional peer-reviewed journals may seriously underestimate the occurrence of such cluster events. |
Diffusion of handwashing knowledge and water treatment practices from mothers in an antenatal hygiene promotion program to nonpregnant friends and relatives, Machinga District, Malawi
Rajasingham A , Routh JA , Loharikar A , Chemey E , Ayers T , Gunda AW , Russo ET , Wood S , Quick R . Int Q Community Health Educ 2018 39 (1) 272684x18797063 Access to safe drinking water and improved hygiene are essential for preventing diarrheal diseases in low- and middle-income countries. Integrating water treatment and hygiene products into antenatal clinic care can motivate water treatment and handwashing among pregnant women. Free water hygiene kits (water storage containers, sodium hypochlorite water treatment solution, and soap) and refills of water treatment solution and soap were integrated into antenatal care and delivery services in Machinga District, Malawi, resulting in improved water treatment and hygiene practices in the home and increased maternal health service use. To determine whether water treatment and hygiene practices diffused from maternal health program participants to friends and relatives households in the same communities, we assessed the practices of 106 nonpregnant friends and relatives of these new mothers at baseline and 1-year follow-up. At follow-up, friends and relatives were more likely than at baseline to have water treatment products observable in the home (33.3% vs. 1.2%, p < 0.00001) and detectable free chlorine residual in their water, confirming water treatment (35.7% vs. 1.4%; p < 0.00001). Qualitative data from in-depth interviews also suggested that program participants helped motivate adoption of water treatment and hygiene behaviors among their friends and relatives. |
Safe water and hygiene integration with human immunodeficiency virus and antenatal services: Leveraging opportunities for public health interventions and improved service uptake
Routh JA , Loharikar A , Chemey E , Msoma A , Ntambo M , Mvula R , Ayers T , Gunda A , Russo ET , Barr BT , Wood S , Quick R . Am J Trop Med Hyg 2018 98 (5) 1234-1241 Integrating public health interventions with antenatal clinic (ANC) visits may motivate women to attend ANC, thereby improving maternal and neonatal health, particularly for human immunodeficiency virus (HIV)-infected persons. In 2009, in an integrated ANC/Preventing Mother-to-Child Transmission program, we provided free hygiene kits (safe storage containers, WaterGuard water treatment solution, soap, and oral rehydration salts) to women at their first ANC visit and refills at subsequent visits. To increase fathers' participation, we required partners' presence for women to receive hygiene kits. We surveyed pregnant women at baseline and at 12-month follow-up to assess ANC service utilization, HIV counseling and testing (HCT), test drinking water for residual chlorine, and observe handwashing. We conducted in-depth interviews with pregnant women, partners, and health workers. We enrolled 106 participants; 97 (92%) were found at follow-up. During the program, 99% of pregnant women and their partners received HCT, and 99% mutually disclosed. Fifty-six percent of respondents had >/= 4 ANC visits and 90% delivered at health facilities. From baseline to follow-up, the percentage of women who knew how to use WaterGuard (23% versus 80%, P < 0.0001), had residual chlorine in stored water (0% versus 73%, P < 0.0001), had confirmed WaterGuard use (0% versus 70%, P < 0.0003), and demonstrated proper handwashing technique (21% versus 64% P < 0.0001) increased. Program participants showed significant improvements in water treatment and hygiene, and high use of ANC services and HCT. This evaluation suggests that integration of hygiene kits, refills, and HIV testing during ANC is feasible and may help improve household hygiene and increase use of health services. |
Successful use of interventions in combination to improve human papillomavirus vaccination coverage rates among adolescents - Chicago, 2013 to 2015
Choi N , Curtis CR , Loharikar A , Fricchione M , Jones E , Balzer E , Liu Y , Levin M , Chavez-Torres M , Morita J , Caskey R . Acad Pediatr 2018 18 S93-s100 In 2013, National Immunization Survey-Teen data indicated that >40% of female adolescents had not initiated the human papillomavirus (HPV) vaccine series and >60% had not completed the series, documenting vaccination rates much lower than those for other vaccines recommended for adolescents. The Chicago Department of Public Health (CDPH) was 1 of 22 jurisdictions nationwide to receive a Prevention and Public Health Fund award through the Centers for Disease Control and Prevention to improve HPV vaccination rates among adolescents. The CDPH implemented 5 interventions targeting the public, clinicians and their staff, and diverse immunization and cancer prevention stakeholders. Compared with 2013 jurisdiction-specific HPV vaccination rates among all adolescents, Chicago's HPV vaccination rates were increased significantly in 2014 and 2015. This article details the methods and results of Chicago's successful interventions, the particular strengths as well as barriers encountered, and future steps necessary for sustaining improvement. |
CDC activities for improving implementation of human papillomavirus vaccination, cervical cancer screening, and surveillance worldwide
Senkomago V , Duran D , Loharikar A , Hyde TB , Markowitz LE , Unger ER , Saraiya M . Emerg Infect Dis 2017 23 (13) S101-7 Cervical cancer incidence and mortality rates are high, particularly in developing countries. Most cervical cancers can be prevented by human papillomavirus (HPV) vaccination, screening, and timely treatment. The US Centers for Disease Control and Prevention (CDC) provides global technical assistance for implementation and evaluation of HPV vaccination pilot projects and programs and laboratory-related HPV activities to assess HPV vaccines. CDC collaborates with global partners to develop global cervical cancer screening recommendations and manuals, implement screening, create standardized evaluation tools, and provide expertise to monitor outcomes. CDC also trains epidemiologists in cancer prevention through its Field Epidemiology Training Program and is working to improve cancer surveillance by supporting efforts of the World Health Organization in developing cancer registry hubs and assisting countries in estimating costs for developing population-based cancer registries. These activities contribute to the Global Health Security Agenda action packages to improve immunization, surveillance, and the public health workforce globally. |
Anxiety-related adverse events following immunization (AEFI): A systematic review of published clusters of illness
Loharikar A , Suragh TA , MacDonald NE , Balakrishnan MR , Benes O , Lamprianou S , Hyde TB , McNeil MM . Vaccine 2017 36 (2) 299-305 BACKGROUND: Clusters of anxiety-related adverse events following immunization (AEFI) have been observed in several countries and have disrupted country immunization programs. We conducted a systematic literature review to characterize these clusters, to generate prevention and management guidance for countries. METHODS: We searched seven peer-reviewed databases for English language reports of anxiety-related AEFI clusters (≥2 persons) with pre-specified keywords across 4 categories: symptom term, cluster term, vaccine term, and cluster AEFI phenomenon term/phrase. All relevant reports were included regardless of publication date, case-patient age, or vaccine. Two investigators independently reviewed abstracts and identified articles for full review. Data on epidemiologic/clinical information were extracted from full text review including setting, vaccine implicated, predominant case-patient symptoms, clinical management, community and media response, and outcome/impact on the vaccination program. RESULTS: Of 1472 abstracts reviewed, we identified eight published clusters, from all six World Health Organization (WHO) regions except the African Region. Seven clusters occurred among children in school settings, and one was among adult military reservists. The size and nature of these clusters ranged from 7 patients in one school to 806 patients in multiple schools. Patients' symptoms included dizziness, headache, and fainting with rapid onset after vaccination. Implicated vaccines included tetanus (2), tetanus-diphtheria (1), hepatitis B (1), oral cholera (1), human papillomavirus (1), and influenza A (H1N1)pdm09 (2). In each report, all affected individuals recovered rapidly; however, vaccination program disruption was noted in some instances, sometimes for up to one year. CONCLUSIONS: Anxiety-related AEFI clusters can be disruptive to vaccination programs, reducing public trust in immunizations and impacting vaccination coverage; response efforts to restore public confidence can be resource intensive. Health care providers should have training on recognition and clinical management of anxiety-related AEFI; public health authorities should have plans to prevent and effectively manage anxiety-related AEFI clusters. Prompt management of these occurrences can be even more important in an era of social media, in which information is rapidly spread. |
Suicide in Illinois, 2005-2010: a reflection of patterns and risks by age groups and opportunities for targeted prevention
McLone SG , Loharikar A , Sheehan K , Mason M . J Trauma Acute Care Surg 2016 81 S30-5 BACKGROUND: Suicide accounts for two-thirds of all deaths from intentional, or violence-related, injury and is a leading cause of death in the United States. Patterns of suicide have been well described among high risk groups, but few studies have compared the circumstances related to suicides across all age groups. We sought to understand the epidemiology of suicide cases in Illinois and to characterize the risks and patterns for suicide among different age groups. METHODS: We utilized suicide data collected in the Illinois Violent Death Reporting System (IVDRS) to assess demographics, method of suicide, circumstances, and mental health status among different age groups. RESULTS: Between 2005 and 2010, 3016 suicides were reported; 692 (23%) were female, and the median age (n=3013) was 45 years (range 10-98 years). The most common method/weapon types were hanging/strangulation (33%), firearm (32%) and poisoning (21%). Hanging was more common (74%) among young people aged 10-19 years, while firearm use was more common among elderly persons age 65 years and over (55%). The percentage of victims within an age group experiencing a crisis within two weeks prior to committing suicide was highest among 10 to 14 year-olds, while the risk factor of having a family member or friend die in past five years was highest among older victims. CONCLUSIONS: The final analysis demonstrated age-related trends in suicide in Illinois suggesting prevention programs should tailor services by age. LEVEL OF EVIDENCE: Level IV epidemiological study,. |
Cholera in the United States, 2001-2011: a reflection of patterns of global epidemiology and travel
Loharikar A , Newton AE , Stroika S , Freeman M , Greene KD , Parsons MB , Bopp C , Talkington D , Mintz ED , Mahon BE . Epidemiol Infect 2014 143 (4) 1-9 US cholera surveillance offers insight into global and domestic trends. Between 2001 and 2011, 111 cases were reported to the Centers for Disease Control and Prevention. Cholera was associated with international travel in 90 (81%) patients and was domestically acquired in 20 (18%) patients; for one patient, information was not available. From January 2001 to October 2010, the 42 (47%) travel-associated cases were associated with travel to Asia. In October 2010, a cholera epidemic started in Haiti, soon spreading to the Dominican Republic (Hispaniola). From then to December 2011, 40 (83%) of the 48 travel-associated cases were associated with travel to Hispaniola. Of 20 patients who acquired cholera domestically, 17 (85%) reported seafood consumption; 10 (59%) ate seafood from the US Gulf Coast. In summary, an increase in travel-associated US cholera cases was associated with epidemic cholera in Hispaniola in 2010-2011. Travel to Asia and consumption of Gulf Coast seafood remained important sources of US cholera cases. |
A national cholera epidemic with high case fatality rates--Kenya 2009
Loharikar A , Briere E , Ope M , Langat D , Njeru I , Gathigi L , Makayotto L , Ismail AM , Thuranira M , Abade A , Amwayi S , Omolo J , Oundo J , De Cock KM , Breiman RF , Ayers T , Mintz E , O'Reilly CE . J Infect Dis 2013 208 Suppl 1 S69-77 BACKGROUND: Cholera remains endemic in sub-Saharan Africa. We characterized the 2009 cholera outbreaks in Kenya and evaluated the response. METHODS: We analyzed surveillance data and estimated case fatality rates (CFRs). Households in 2 districts, East Pokot (224 cases; CFR = 11.7%) and Turkana South (1493 cases; CFR = 1.0%), were surveyed. We randomly selected 15 villages and 8 households per village in each district. Healthcare workers at 27 health facilities (HFs) were surveyed in both districts. RESULTS:. In 2009, cholera outbreaks caused a reported 11 425 cases and 264 deaths in Kenya. Data were available from 44 districts for 6893 (60%) cases. District CFRs ranged from 0% to 14.3%. Surveyed household respondents (n = 240) were aware of cholera (97.5%) and oral rehydration solution (ORS) (87.9%). Cholera deaths were reported more frequently from East Pokot (n = 120) than Turkana South (n = 120) households (20.7% vs. 12.3%). The average travel time to a HF was 31 hours in East Pokot compared with 2 hours in Turkana South. Fewer respondents in East Pokot (9.8%) than in Turkana South (33.9%) stated that ORS was available in their village. ORS or intravenous fluid shortages occurred in 20 (76.9%) surveyed HFs. CONCLUSIONS: High CFRs in Kenya are related to healthcare access disparities, including availability of rehydration supplies. |
Long-term impact of integration of household water treatment and hygiene promotion with antenatal services on maternal water treatment and hygiene practices in Malawi
Loharikar A , Russo E , Sheth A , Menon M , Kudzala A , Tauzie B , Masuku HD , Ayers T , Hoekstra RM , Quick R . Am J Trop Med Hyg 2012 88 (2) 267-74 A clinic-based program to integrate antenatal services with distribution of hygiene kits including safe water storage containers, water treatment solution (brand name WaterGuard), soap, and hygiene education, was implemented in Malawi in 2007 and evaluated in 2010. We surveyed 389 participants at baseline in 2007, and found and surveyed 232 (60%) participants to assess water treatment, test stored drinking water for residual chlorine (an objective measure of treatment), and observe handwashing technique at follow-up in 2010. Program participants were more likely to know correct water treatment procedures (67% versus 36%; P < 0.0001), treat drinking water with WaterGuard (24% versus.2%; P < 0.0001), purchase and use WaterGuard (21% versus 1%; P < 0.001), and demonstrate correct handwashing technique (50% versus 21%; P < 0.001) at the three-year follow-up survey than at baseline. This antenatal-clinic-based program may have contributed to sustained water treatment and proper handwashing technique among program participants. |
Nationwide outbreak of Salmonella Montevideo infections associated with contaminated imported black and red pepper: warehouse membership cards provide critical clues to identify the source
Gieraltowski L , Julian E , Pringle J , Macdonald K , Quilliam D , Marsden-Haug N , Saathoff-Huber L , Von Stein D , Kissler B , Parish M , Elder D , Howard-King V , Besser J , Sodha S , Loharikar A , Dalton S , Williams I , Barton Behravesh C . Epidemiol Infect 2012 141 (6) 1-9 SUMMARY: In November 2009, we initiated a multistate investigation of Salmonella Montevideo infections with pulsed-field gel electrophoresis pattern JIXX01.0011. We identified 272 cases in 44 states with illness onset dates ranging from 1 July 2009 to 14 April 2010. To help generate hypotheses, warehouse store membership card information was collected to identify products consumed by cases. These records identified 19 ill persons who purchased company A salami products before onset of illness. A case-control study was conducted. Ready-to-eat salami consumption was significantly associated with illness (matched odds ratio 8.5, 95% confidence interval 2.1-75.9). The outbreak strain was isolated from company A salami products from an environmental sample from one manufacturing plant, and sealed containers of black and red pepper at the facility. This outbreak illustrates the importance of using membership card information to assist in identifying suspect vehicles, the potential for spices to contaminate ready-to-eat products, and preventing raw ingredient contamination of these products. |
Outbreak of human Salmonella Typhimurium infections linked to contact with baby poultry from a single agricultural feed store chain and mail-order hatchery, 2009
Loharikar A , Vawter S , Warren K , Deasy M 3rd , Moll M , Sandt C , Gilhousen R , Villamil E , Rhorer A , Briere E , Schwensohn C , Trees E , Lafon P , Adams JK , Le B , Behravesh CB . Pediatr Infect Dis J 2012 32 (1) 8-12 BACKGROUND: Over thirty outbreaks of human salmonellosis linked to contact with live poultry from mail-order hatcheries were reported to CDC between 1990-2010. In May 2009, we investigated an outbreak of human Salmonella Typhimurium infections, primarily affecting children. METHODS: A case was defined as a person with the outbreak strain of Salmonella Typhimurium, as determined by pulsed-field gel electrophoresis (PFGE) and multiple-locus variable-number tandem repeat analysis (MLVA), in a Pennsylvania or New York resident with illness onset between May 1- September 1, 2009. We conducted a case-control study to examine the relationship between illness and live poultry contact. Controls were age- and geographically-matched. Traceback and environmental investigations were conducted. RESULTS: We identified 36 case-patients in Pennsylvania and New York; 36% were children aged ≤5 years. Case-patients were more likely than controls to report live baby poultry contact (matched odds ratio [mOR]: 17.0; 95% Confidence Interval [CI]:2.7-710.5), contact with chicks (mOR:14.0; 95% CI:2.1-592.0), ducklings (mOR:8.0; 95% CI:1.1-355.0), and visiting agricultural feed stores (mOR:6.0; 95% CI:1.3-55.2). Most (83%) visited agricultural Feed Store Chain Y, a national agricultural feed store chain, which received poultry from Hatchery C, which is supplied by multiple egg sources. Salmonella Typhimurium was isolated from a source duck flock, but had a different PFGE pattern than the outbreak strain. CONCLUSION: Live baby poultry remain an important source of human salmonellosis, particularly among children. Preventing these infections requires comprehensive interventions at hatcheries and agricultural feed stores; pediatricians should inform patients of risks associated with live poultry contact. |
Typhoid fever outbreak associated with frozen mamey pulp imported from Guatemala - western United States, 2010
Loharikar A , Newton A , Rowley P , Wheeler C , Bruno T , Barillas H , Pruckler J , Theobald L , Lance S , Brown JM , Barzilay EJ , Arvelo W , Mintz E , Fagan R . Clin Infect Dis 2012 55 (1) 61-6 BACKGROUND: Fifty-four outbreaks of domestically-acquired typhoid fever were reported between 1960-99. In 2010, the Southern Nevada Health District detected an outbreak of typhoid fever among persons who had not recently travelled abroad. METHODS: We conducted a case-control study to examine the relationship between illness and exposures. A case was defined as illness with the outbreak strain of Salmonella serotype Typhi, as determined by pulsed-field gel electrophoresis (PFGE), with onset during 2010. Controls were matched by neighborhood, age, and sex. Bivariate and multivariate statistical analysis was completed using logistic regression. Traceback investigation was completed. RESULTS: We identified twelve cases in three states with onset from April 15-September 4, 2010. The median age of case-patients was 18 years (range 4-48), eight (67%) were female, and 11 (92%) were Hispanic. Nine (82%) were hospitalized; none died. Consumption of frozen mamey pulp in a fruit shake was reported by 75% (6/8) of case-patients and no (0/33) controls (matched odds ratio [mOR]=33.9, 95% confidence interval [CI]= 4.9-undefined). Traceback investigations implicated two brands of frozen mamey pulp from a single manufacturer in Guatemala, which was also implicated in a 1998-99 outbreak of typhoid fever in Florida. CONCLUSION: Reporting of individual cases of typhoid fever and subtyping of isolates by pulsed-field gel electrophoresis resulted in rapid detection of an outbreak, associated with a ready-to- eat frozen food imported from a typhoid-endemic region. Improvements in food manufacturing practices and monitoring will prevent additional outbreaks from occurring. |
Four multistate outbreaks of human Salmonella infections associated with live poultry contact, United States, 2009
Loharikar A , Briere E , Schwensohn C , Weninger S , Wagendorf J , Scheftel J , Garvey A , Warren K , Villamil E , Rudroff JA , Kurkjian K , Levine S , Colby K , Morrison B , May A , Anderson S , Daly E , Marsden-Haug N , Erdman MM , Gomez T , Rhorer A , Castleman J , Adams JK , Theobald L , Lafon P , Trees E , Mitchell J , Sotir MJ , Behravesh CB . Zoonoses Public Health 2012 59 (5) 347-54 Outbreaks of human salmonellosis associated with live poultry contact have been reported since 1955. Multiple Salmonella serotypes have been associated with these outbreaks, and specific outbreak strains have been repeatedly linked to single hatcheries over multiple years. During 2009, four multistate outbreaks of human Salmonella infections associated with direct and indirect exposure to live poultry purchased from mail-order hatcheries and agricultural feed stores were identified, resulting in 165 culture-confirmed cases in 30 states. This report describes the epidemiologic, environmental and laboratory investigations conducted by state and local health departments, state departments of agriculture, the U.S. Department of Agriculture (USDA), Animal and Plant Health Inspection Service (APHIS), National Poultry Improvement Plan (NPIP) and National Veterinary Services Laboratories (NVSL), and the Centers for Disease Control and Prevention (CDC). Case-patients were identified through PulseNet, the national molecular subtyping network for foodborne disease surveillance, and interviewed using the CDC standard live poultry contact questionnaire that asks about poultry-related exposures during the 7 days before illness onset. These outbreaks highlight the need to focus efforts on strategies to decrease and prevent human illness associated with live poultry contact through comprehensive interventions at the mail-order hatchery, agricultural feed store and consumer levels. Additional consumer education and interventions at mail-order hatcheries and venues where live poultry are sold, including agricultural feed stores, are necessary to prevent transmission of Salmonella from poultry to humans. |
Rapid assessment of cholera-related deaths, Artibonite Department, Haiti, 2010
Routh JA , Loharikar A , Fouche MDB , Cartwright EJ , Roy SL , Ailes E , Archer WR , Tappero JW , Roels TH , Dahourou G , Quick RE . Emerg Infect Dis 2011 17 (11) 2139-2142 We evaluated a high (6%) cholera case-fatality rate in Haiti. Of 39 community decedents, only 23% consumed oral rehydration salts at home, and 59% did not seek care, whereas 54% of 48 health facility decedents died after overnight admission. Early in the cholera epidemic, care was inadequate or nonexistent. |
Risk factors early in the 2010 cholera epidemic, Haiti
O'Connor KA , Cartwright E , Loharikar A , Routh J , Gaines J , Fouche MDB , Jean-Louis R , Ayers T , Johnson D , Tappero JW , Roels TH , Archer WR , Dahourou GA , Mintz E , Quick R , Mahon BE . Emerg Infect Dis 2011 17 (11) 2136-2138 During the early weeks of the cholera outbreak that began in Haiti in October 2010, we conducted a case-control study to identify risk factors. Drinking treated water was strongly protective against illness. Our results highlight the effectiveness of safe water in cholera control. |
Epidemic cholera in a crowded urban environment, Port-au-Prince, Haiti
Dunkle SE , Mba-Jonas A , Loharikar A , Fouche B , Peck M , Ayers T , Archer WR , Beau De Rochars VM , Bender T , Moffett DB , Tappero JW , Dahourou G , Roels TH , Quick R . Emerg Infect Dis 2011 17 (11) 2143-2146 We conducted a case-control study to investigate factors associated with epidemic cholera. Water treatment and handwashing may have been protective, highlighting the need for personal hygiene for cholera prevention in contaminated urban environments. We also found a diverse diet, a possible proxy for improved nutrition, was protective against cholera. |
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