Last data update: Mar 21, 2025. (Total: 48935 publications since 2009)
Records 1-20 (of 20 Records) |
Query Trace: Phelps R[original query] |
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Comparative neurotranscriptomics reveal widespread species differences associated with bonding (preprint)
Tripp JA , Berrio A , McGraw LA , Matz MV , Davis JK , Inoue K , Thomas JW , Young LJ , Phelps SM . bioRxiv 2020 2020.12.07.415463 Background Pair bonding with a reproductive partner is rare among mammals but is an important feature of human social behavior. Decades of research on monogamous prairie voles (Microtus ochrogaster), along with comparative studies using the related non-bonding meadow vole (M. pennsylvanicus), have revealed many of the neural and molecular mechanisms necessary for pair-bond formation in that species. However, these studies have largely focused on just a few neuromodulatory systems. To test the hypothesis that neural gene expression differences underlie differential capacities to bond, we performed RNA-sequencing on tissue from three brain regions important for bonding and other social behaviors across bond-forming prairie voles and non-bonding meadow voles. We examined gene expression in the amygdala, hypothalamus, and combined ventral pallidum/nucleus accumbens in virgins and at three time points after mating to understand species differences in gene expression at baseline, in response to mating, and during bond formation.Results We first identified species and brain region as the factors most strongly associated with gene expression in our samples. Next, we found gene categories related to cell structure, translation and metabolism that differed in expression across species in virgins, as well as categories associated with cell structure, synaptic and neuroendocrine signaling, and transcription and translation that varied among the focal regions in our study. Additionally, we identified genes that were differentially expressed across species after mating in each of our regions of interest. These include genes involved in regulating transcription, neuron structure, and synaptic plasticity. Finally, we identified modules of co-regulated genes that were strongly correlated with brain region in both species, and modules that were correlated with post-mating time points in prairie voles but not meadow voles.Conclusions These results reinforce the importance of pre-mating differences that confer the ability to form pair bonds in prairie voles but not promiscuous species such as meadow voles. Gene ontology analysis supports the hypothesis that pair-bond formation involves transcriptional regulation, and changes in neuronal structure. Together, our results expand knowledge of the genes involved in the pair bonding process and open new avenues of research in the molecular mechanisms of bond formation.Competing Interest StatementThe authors have declared no competing interest.AMYAmygdalaAVPArginine-vasopressinFDRFalse discovery rateHTHypothalamusLFCLog (base 2) fold changeMEModule eigengeneMWUMann-Whitney U testOTOxytocinVP/NAcVentral pallidum/nucleus accumbens |
Comparative neurotranscriptomics reveal widespread species differences associated with bonding.
Tripp JA , Berrio A , McGraw LA , Matz MV , Davis JK , Inoue K , Thomas JW , Young LJ , Phelps SM . BMC Genomics 2021 22 (1) 399 ![]() BACKGROUND: Pair bonding with a reproductive partner is rare among mammals but is an important feature of human social behavior. Decades of research on monogamous prairie voles (Microtus ochrogaster), along with comparative studies using the related non-bonding meadow vole (M. pennsylvanicus), have revealed many of the neural and molecular mechanisms necessary for pair-bond formation in that species. However, these studies have largely focused on just a few neuromodulatory systems. To test the hypothesis that neural gene expression differences underlie differential capacities to bond, we performed RNA-sequencing on tissue from three brain regions important for bonding and other social behaviors across bond-forming prairie voles and non-bonding meadow voles. We examined gene expression in the amygdala, hypothalamus, and combined ventral pallidum/nucleus accumbens in virgins and at three time points after mating to understand species differences in gene expression at baseline, in response to mating, and during bond formation. RESULTS: We first identified species and brain region as the factors most strongly associated with gene expression in our samples. Next, we found gene categories related to cell structure, translation, and metabolism that differed in expression across species in virgins, as well as categories associated with cell structure, synaptic and neuroendocrine signaling, and transcription and translation that varied among the focal regions in our study. Additionally, we identified genes that were differentially expressed across species after mating in each of our regions of interest. These include genes involved in regulating transcription, neuron structure, and synaptic plasticity. Finally, we identified modules of co-regulated genes that were strongly correlated with brain region in both species, and modules that were correlated with post-mating time points in prairie voles but not meadow voles. CONCLUSIONS: These results reinforce the importance of pre-mating differences that confer the ability to form pair bonds in prairie voles but not promiscuous species such as meadow voles. Gene ontology analysis supports the hypothesis that pair-bond formation involves transcriptional regulation, and changes in neuronal structure. Together, our results expand knowledge of the genes involved in the pair bonding process and open new avenues of research in the molecular mechanisms of bond formation. |
Adapting HIV services for pregnant and breastfeeding women, infants, children, adolescents and families in resource-constrained settings during the COVID-19 pandemic.
Vrazo AC , Golin R , Fernando NB , Killam WP , Sharifi S , Phelps BR , Gleason MM , Wolf HT , Siberry GK , Srivastava M . J Int AIDS Soc 2020 23 (9) e25622 INTRODUCTION: The COVID-19 pandemic has impacted global health service delivery, including provision of HIV services. Countries with high HIV burden are balancing the need to minimize interactions with health facilities to reduce the risk of COVID-19 transmission, while delivering uninterrupted essential HIV prevention, testing and treatment services. Many of these adaptations in resource-constrained settings have not adequately accounted for the needs of pregnant and breastfeeding women, infants, children and adolescents. We propose whole-family, tailored programme adaptations along the HIV clinical continuum to protect the programmatic gains made in services. DISCUSSION: Essential HIV case-finding services for pregnant and breastfeeding women and children should be maintained and include maternal testing, diagnostic testing for infants exposed to HIV, index testing for children whose biological parents or siblings are living with HIV, as well as for children/adolescents presenting with symptoms concerning for HIV and comorbidities. HIV self-testing for children two years of age and older should be supported with caregiver and provider education. Adaptations include bundling services in the same visit and providing testing outside of facilities to the extent possible to reduce exposure risk to COVID-19. Virtual platforms can be used to identify vulnerable children at risk of HIV infection, abuse, harm or violence, and link them to necessary clinical and psychosocial support services. HIV treatment service adaptations for families should focus on family based differentiated service delivery models, including community-based ART initiation and multi-month ART dispensing. Viral load monitoring should not be a barrier to transitioning children and adolescents experiencing treatment failure to more effective ART regimens, and viral load monitoring for pregnant and breastfeeding women and children should be prioritized and bundled with other essential services. CONCLUSIONS: Protecting pregnant and breastfeeding women, infants, children and adolescents from acquiring SARS-CoV-2 while sustaining essential HIV services is an immense global health challenge. Tailored, family friendly programme adaptations for case-finding, ART delivery and viral load monitoring for these populations have the potential to limit SARS-CoV-2 transmission while ensuring the continuity of life-saving HIV case identification and treatment efforts. |
Risk of transmissibility from neurodegenerative disease-associated proteins: Experimental knowns and unknowns
Asher DM , Belay E , Bigio E , Brandner S , Brubaker SA , Caughey B , Clark B , Damon I , Diamond M , Freund M , Hyman BT , Jucker M , Keene CD , Lieberman AP , Mackiewicz M , Montine TJ , Morgello S , Phelps C , Safar J , Schneider JA , Schonberger LB , Sigurdson C , Silverberg N , Trojanowski JQ , Frosch MP . J Neuropathol Exp Neurol 2020 79 (11) 1141-1146 Recent studies in animal models demonstrate that certain misfolded proteins associated with neurodegenerative diseases can support templated misfolding of cognate native proteins, to propagate across neural systems, and to therefore have some of the properties of classical prion diseases like Creutzfeldt-Jakob disease. The National Institute of Aging convened a meeting to discuss the implications of these observations for research priorities. A summary of the discussion is presented here, with a focus on limitations of current knowledge, highlighting areas that appear to require further investigation in order to guide scientific practice while minimizing potential exposure or risk in the laboratory setting. The committee concluded that, based on all currently available data, although neurodegenerative disease-associated aggregates of several different non-prion proteins can be propagated from humans to experimental animals, there is currently insufficient evidence to suggest more than a negligible risk, if any, of a direct infectious etiology for the human neurodegenerative disorders defined in part by these proteins. Given the importance of this question, the potential for noninvasive human transmission of proteopathic disorders is deserving of further investigation. |
Possibility for reverse zoonotic transmission of SARS-CoV-2 to free-ranging wildlife: A case study of bats.
Olival KJ , Cryan PM , Amman BR , Baric RS , Blehert DS , Brook CE , Calisher CH , Castle KT , Coleman JTH , Daszak P , Epstein JH , Field H , Frick WF , Gilbert AT , Hayman DTS , Ip HS , Karesh WB , Johnson CK , Kading RC , Kingston T , Lorch JM , Mendenhall IH , Peel AJ , Phelps KL , Plowright RK , Reeder DM , Reichard JD , Sleeman JM , Streicker DG , Towner JS , Wang LF . PLoS Pathog 2020 16 (9) e1008758 ![]() ![]() The COVID-19 pandemic highlights the substantial public health, economic, and societal consequences of virus spillover from a wildlife reservoir. Widespread human transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) also presents a new set of challenges when considering viral spillover from people to naïve wildlife and other animal populations. The establishment of new wildlife reservoirs for SARS-CoV-2 would further complicate public health control measures and could lead to wildlife health and conservation impacts. Given the likely bat origin of SARS-CoV-2 and related beta-coronaviruses (β-CoVs), free-ranging bats are a key group of concern for spillover from humans back to wildlife. Here, we review the diversity and natural host range of β-CoVs in bats and examine the risk of humans inadvertently infecting free-ranging bats with SARS-CoV-2. Our review of the global distribution and host range of β-CoV evolutionary lineages suggests that 40+ species of temperate-zone North American bats could be immunologically naïve and susceptible to infection by SARS-CoV-2. We highlight an urgent need to proactively connect the wellbeing of human and wildlife health during the current pandemic and to implement new tools to continue wildlife research while avoiding potentially severe health and conservation impacts of SARS-CoV-2 "spilling back" into free-ranging bat populations. |
PEPFAR's response to the convergence of the HIV and COVID-19 pandemics in Sub-Saharan Africa.
Golin R , Godfrey C , Firth J , Lee L , Minior T , Phelps BR , Raizes EG , Ake JA , Siberry GK . J Int AIDS Soc 2020 23 (8) e25587 INTRODUCTION: The COVID-19 pandemic reached the African continent in less than three months from when the first cases were reported from mainland China. As COVID-19 preparedness and response plans were rapidly instituted across sub-Saharan Africa, many governments and donor organizations braced themselves for the unknown impact the COVID-19 pandemic would have in under-resourced settings with high burdens of PLHIV. The potential negative impact of COVID-19 in these countries is uncertain, but is estimated to contribute both directly and indirectly to the morbidity and mortality of PLHIV, requiring countries to leverage existing HIV care systems to propel COVID-19 responses, while safeguarding PLHIV and HIV programme gains. In anticipation of COVID-19-related disruptions, PEPFAR promptly established guidance to rapidly adapt HIV programmes to maintain essential HIV services while protecting recipients of care and staff from COVID-19. This commentary reviews PEPFAR's COVID-19 technical guidance and provides country-specific examples of programme adaptions in sub-Saharan Africa. DISCUSSION: The COVID-19 pandemic may pose significant risks to the continuity of HIV services, especially in countries with high HIV prevalence and weak and over-burdened health systems. Although there is currently limited understanding of how COVID-19 affects PLHIV, it is imperative that public health systems and academic centres monitor the impact of COVID-19 on PLHIV. The general principles of the HIV programme adaptation guidance from PEPFAR prioritize protecting the gains in the HIV response while minimizing in-person home and facility visits and other direct contact when COVID-19 control measures are in effect. PEPFAR-supported clinical, laboratory, supply chain, community and data reporting systems can play an important role in mitigating the impact of COVID-19 in sub-Saharan Africa. CONCLUSIONS: As community transmission of COVID-19 continues and the number of country cases rise, fragile health systems may be strained. Utilizing the adaptive, data-driven programme approaches in facilities and communities established and supported by PEPFAR provides the opportunity to strengthen the COVID-19 response while protecting the immense gains spanning HIV prevention, testing and treatment reached thus far. |
Children and their families are entitled to the benefits of differentiated ART delivery
Wilkinson L , Siberry GK , Golin R , Phelps BR , Wolf HT , Modi S , Grimsrud A . J Int AIDS Soc 2020 23 (4) e25482 In 2017, the World Health Organization (WHO), together with the United States Centers for Disease Control and Prevention, the United States President's Emergency Plan for AIDS Relief (PEPFAR), the United States Agency for International Development and the International AIDS Society, recognized the importance of including children living with HIV who are clinically stable in differentiated antiretroviral (ART) delivery models to support family-centred care [1]. As children living with HIV age and grow, ART dose adjustments become infrequent, with only three adjustments anticipated between the ages of one to seven years [1, 2]. Consequently, WHO’s Key Considerations for Differentiated Antiretroviral Therapy Delivery for Specific Populations outlined that children who are clinically stable are eligible for longer durations between ART refills and simplified drug pickup approaches. Clinical stability was defined as at least two years old, on ART for more than a year and the same regimen for at least three months, no adverse drug reactions requiring regular monitoring or current illness (including malnutrition), evidence of treatment success (two consecutive viral load measurements of <1000 copies/mL, rising CD4 counts or CD4 counts >200 cells/mm3) and caregivers orientated on the disclosure process. While viral load measurements are not required in this definition, it remains preferable, simplifying the assessment of clinical stability. |
Investigating the histopathological findings and immunolocalization of rickettsialpox infection in skin biopsies: A case series and review of the literature
Vyas NS , Shieh WJ , Phelps RG . J Cutan Pathol 2020 47 (5) 451-458 BACKGROUND: Recognition of rickettsialpox infection on skin biopsy can be challenging. The histopathology is nonspecific and inconsistently described. We assess classic histopathologic features in confirmed cases and review the literature. METHODS: We searched for cases of "rickettsialpox" diagnosed between 2006-2018 with positive immunostaining for Spotted Fever Group Rickettsia species. Original slides were evaluated for vacuolar alterations, granulomatous inflammation, vasculitis, necrosis, fibrin thrombi, microvesiculation, papillary dermal edema and extravasated red blood cells. All biopsies were stained with CD3, CD20, CD68 and myeloperoxidase. RESULTS: Six biopsies were compiled, 3 of which were sampled from vesiculopapules, 1 from a maculopapule, and 2 from eschars. Vacuolar alterations and vasculitis were present in all biopsies (6/6; 100%). Granulomatous inflammation was present in 5 biopsies (5/6; 83.3%). Fibrin thrombi and red blood cells were seen in 3/6 (50%) of biopsies. The eschars showed necrosis of the epidermis and superficial dermis (2/6, 33.3%). Only 1 biopsy showed intraepidermal vesiculation and papillary dermal edema (1/6; 16.7%). All six biopsies showed perivascular infiltration with CD3+ T-cells, and low amounts of CD20+ B-cells and neutrophils. Five of the six biopsies (83.3%) showed significant levels of CD68+ histiocytes. CONCLUSION: The histopathology of rickettsialpox infection is septic lymphocytic and granulomatous vasculitis. This article is protected by copyright. All rights reserved. |
Changes in prevalence of health care-associated infections in U.S. hospitals
Magill SS , O'Leary E , Janelle SJ , Thompson DL , Dumyati G , Nadle J , Wilson LE , Kainer MA , Lynfield R , Greissman S , Ray SM , Beldavs Z , Gross C , Bamberg W , Sievers M , Concannon C , Buhr N , Warnke L , Maloney M , Ocampo V , Brooks J , Oyewumi T , Sharmin S , Richards K , Rainbow J , Samper M , Hancock EB , Leaptrot D , Scalise E , Badrun F , Phelps R , Edwards JR . N Engl J Med 2018 379 (18) 1732-1744 BACKGROUND: A point-prevalence survey that was conducted in the United States in 2011 showed that 4% of hospitalized patients had a health care-associated infection. We repeated the survey in 2015 to assess changes in the prevalence of health care-associated infections during a period of national attention to the prevention of such infections. METHODS: At Emerging Infections Program sites in 10 states, we recruited up to 25 hospitals in each site area, prioritizing hospitals that had participated in the 2011 survey. Each hospital selected 1 day on which a random sample of patients was identified for assessment. Trained staff reviewed medical records using the 2011 definitions of health care-associated infections. We compared the percentages of patients with health care-associated infections and performed multivariable log-binomial regression modeling to evaluate the association of survey year with the risk of health care-associated infections. RESULTS: In 2015, a total of 12,299 patients in 199 hospitals were surveyed, as compared with 11,282 patients in 183 hospitals in 2011. Fewer patients had health care-associated infections in 2015 (394 patients [3.2%; 95% confidence interval {CI}, 2.9 to 3.5]) than in 2011 (452 [4.0%; 95% CI, 3.7 to 4.4]) (P<0.001), largely owing to reductions in the prevalence of surgical-site and urinary tract infections. Pneumonia, gastrointestinal infections (most of which were due to Clostridium difficile [now Clostridioides difficile]), and surgical-site infections were the most common health care-associated infections. Patients' risk of having a health care-associated infection was 16% lower in 2015 than in 2011 (risk ratio, 0.84; 95% CI, 0.74 to 0.95; P=0.005), after adjustment for age, presence of devices, days from admission to survey, and status of being in a large hospital. CONCLUSIONS: The prevalence of health care-associated infections was lower in 2015 than in 2011. To continue to make progress in the prevention of such infections, prevention strategies against C. difficile infection and pneumonia should be augmented. (Funded by the Centers for Disease Control and Prevention.). |
Boosting ART uptake and retention among HIV-infected pregnant and breastfeeding women and their infants: the promise of innovative service delivery models
Srivastava M , Sullivan D , Phelps BR , Modi S , Broyles LN . J Int AIDS Soc 2018 21 (1) INTRODUCTION: With the rapid scale-up of antiretroviral treatment (ART) in the "Treat All" era, there has been increasing emphasis on using differentiated models of HIV service delivery. The gaps within the clinical cascade for mothers and their infants suggest that current service delivery models are not meeting families' needs and prompt re-consideration of how services are provided. This article will explore considerations for differentiated care and encourage the ongoing increase of ART coverage through innovative strategies while also addressing the unique needs of mothers and infants. DISCUSSION: Service delivery models should recognize that the timing of the mother's HIV diagnosis is a critical aspect of determining eligibility. Women newly diagnosed with HIV require a more intensive approach so that adequate counselling and monitoring of ART initiation and response can be provided. Women already on ART with evidence of virologic failure are also at high risk of transmitting HIV to their infants and require close follow-up. However, women stable on ART with a suppressed viral load before conception have a very low likelihood of HIV transmission and thus are strong candidates for multi-month ART dispensing, community-based distribution of ART, adherence clubs, community adherence support groups and longer intervals between clinical visits. A number of other factors should be considered when defining eligibility of mothers and infants for differentiated care, including location of services, viral load monitoring and duration on ART. To provide differentiated care that is client-centred and driven while encompassing a family-based approach, it will be critical to engage mothers, families and communities in models that will optimize client satisfaction, retention in care and quality of services. CONCLUSIONS: Differentiated care for mothers and infants represents an opportunity to provide client-centred care that reduces the burden on clients and health systems while improving the quality and uptake of services for families. However, with decreasing funding, stable HIV incidence, and aspirations for sustainability, it is critical to consider efficient, customized and cost-effective models of care for these populations as we aspire to eliminate mother-to-child transmission of HIV. |
A new methodological approach to adjust alcohol exposure distributions to improve the estimation of alcohol-attributable fractions
Parish WJ , Aldridge A , Allaire B , Ekwueme DU , Phelps D , Guy GP Jr , Thomas CC , Trogdon JG . Addiction 2017 112 (11) 2053-2063 BACKGROUND AND AIMS: To assess the burden of excessive alcohol use, researchers routinely estimate alcohol-attributable fractions (AAFs). However, underreporting in survey data can bias these estimates. We present an approach that adjusts for underreporting in the estimation of AAFs, particularly across subgroups. This framework is a refinement of a previous method (Rehm et al., 2010). METHODS: We use a measurement error model to derive the "true" alcohol distribution from a "reported" alcohol distribution. The "true" distribution leverages per capita sales data to identify the distribution average and then identifies the shape of the distribution with self-reported survey data. Data are from the National Alcohol Survey (NAS), the National Household Survey on Drug Abuse (NHSDA), and the National Epidemiologic Survey on Alcohol and Related Conditions (NESARC). We compared our approach with previous approaches by estimating the AAF of female breast cancer cases. RESULTS: Compared with Rehm et al.'s approach, our refinement performs similarly under a gamma assumption. For example, among females aged 18-25, the two approaches produce estimates from NHSDA that are within a percentage point. However, relaxing the gamma assumption generally produces more conservative evidence. For example, among females aged 18-25, estimates from NHSDA based on the best-fitting distribution are only 19.33 percent of breast cancer cases, which is a much smaller proportion than the gamma-based estimates of about 28 percent. CONCLUSIONS: A refinement of Rehm et al.'s approach to adjusting for underreporting in the estimation of alcohol-attributable fractions provides more flexibility. This flexibility can avoid biases associated with failing to account for the underlying differences in alcohol consumption patterns across different study populations. Comparisons of our refinement with Rehm et al.'s approach show that results are similar when a gamma distribution is assumed. However, results are appreciably lower when the best-fitting distribution is chosen versus gamma-based results. |
Translating technical support into country action: The role of the Interagency Task Team on the Prevention and Treatment of HIV Infection in Pregnant Women, Mothers, and Children in the Global Plan era
Luo C , Hirnschall G , Rodrigues J , Romano S , Essajee S , Rogers B , McCarthy E , Mwango A , Sangrujee N , Adler MR , Houston JC , Langa JO , Urso M , Bolu O , Tene G , Elat Nfetam JB , Kembou E , Phelps BR . J Acquir Immune Defic Syndr 2017 75 Suppl 1 S7-s16 While the Interagency Task Team on the Prevention and Treatment of HIV Infection in Pregnant Women, Mothers, and Children (IATT) partnership existed before the Global Plan Towards the Elimination of New HIV Infections Among Children by 2015 and Keeping Their Mothers Alive (Global Plan), its reconfiguration was critical to coordinating provision of technical assistance that positively influenced country decision-making and program performance. This article describes how the Global Plan anchored the work of the IATT and, in turn, how the IATT's technical assistance helped to accelerate achievement of the Global Plan targets and milestones. The technical assistance that will be discussed addressed a broad range of priority actions and milestones described in the Global Plan: (1) planning for and implementing Option B+; (2) strengthening monitoring and evaluation systems; (3) translating evidence into action and advocacy; and (4) promoting community engagement. This article also reviews the ongoing challenges and opportunities of providing technical assistance in a rapidly evolving environment that calls for ever more flexible and contextualized responses. The effectiveness of technical assistance facilitated by the IATT was defined by its timeliness, evidence base, and unique global perspective that built on the competencies of its partners and promoted synergies across program areas. Reaching the final goal of eliminating vertical transmission of HIV infection and achieving an AIDS-free generation in countries with the highest HIV burden requires that the IATT partnership and technical assistance remain responsive to country-specific needs while aligning with the current programmatic reality and new global goals such as the Sustainable Development Goals and 90-90-90 targets. |
Confronting challenges in monitoring and evaluation: Innovation in the context of the Global Plan towards the elimination of new HIV infections among children by 2015 and keeping their mothers alive
Radin AK , Abutu AA , Okwero MA , Adler MR , Anyaike C , Asiimwe HT , Behumbiize P , Efuntoye TA , King RL , Kisaakye LN , Ogundehin DT , Phelps BR , Watts H , Weissglas F . J Acquir Immune Defic Syndr 2017 75 Suppl 1 S66-s75 The Global Plan Towards the Elimination of New HIV Infections Among Children by 2015 and Keeping Their Mothers Alive (Global Plan), which was launched in 2011, set a series of ambitious targets, including a reduction of new HIV infections among children by 90% by 2015 (from a baseline year of 2009) and AIDS-related maternal mortality by 50% by 2015. To reach these targets, the Global Plan called for unprecedented investments in the prevention of mother-to-child transmission of HIV (PMTCT), innovative new approaches to service delivery, immense collective effort on the programmatic and policy fronts, and importantly, a renewed focus on data collection and use. We provide an overview of major achievements in monitoring and evaluation across Global Plan countries and highlight key challenges and innovative country-driven solutions using PMTCT program data. Specifically, we describe the following: (1) Uganda's development and use of a weekly reporting system for PMTCT using short message service technology that facilitates real-time monitoring and programmatic adjustments throughout the transition to a "treat all" approach for pregnant and breastfeeding women living with HIV (Option B+); (2) Uganda's work to eliminate parallel reporting systems while strengthening the national electronic district health information system; and (3) how routine PMTCT program data in Nigeria can be used to estimate HIV prevalence at the local level and address a critical gap in local descriptive epidemiologic data to better target limited resources. We also identify several ongoing challenges in data collection, analysis, and use, and we suggest potential solutions. |
Mass gatherings and respiratory disease outbreaks in the United States - should we be worried? Results from a systematic literature review and analysis of the National Outbreak Reporting System
Rainey JJ , Phelps T , Shi J . PLoS One 2016 11 (8) e0160378 BACKGROUND: Because mass gatherings create environments conducive for infectious disease transmission, public health officials may recommend postponing or canceling large gatherings during a moderate or severe pandemic. Despite these recommendations, limited empirical information exists on the frequency and characteristics of mass gathering-related respiratory disease outbreaks occurring in the United States. METHODS: We conducted a systematic literature review to identify articles about mass gathering-related respiratory disease outbreaks occurring in the United States from 2005 to 2014. A standard form was used to abstract information from relevant articles identified from six medical, behavioral and social science literature databases. We also analyzed data from the National Outbreaks Reporting System (NORS), maintained by the Centers for Disease Control and Prevention since 2009, to estimate the frequency of mass gathering-related respiratory disease outbreaks reported to the system. RESULTS: We identified 21 published articles describing 72 mass gathering-related respiratory disease outbreaks. Of these 72, 40 (56%) were associated with agriculture fairs and Influenza A H3N2v following probable swine exposure, and 25 (35%) with youth summer camps and pandemic Influenza A H1N1. Outbreaks of measles (n = 1) and mumps (n = 2) were linked to the international importation of disease. Between 2009 and 2013, 1,114 outbreaks were reported to NORS, including 96 respiratory disease outbreaks due to Legionella. None of these legionellosis outbreaks was linked to a mass gathering according to available data. CONCLUSION: Mass gathering-related respiratory disease outbreaks may be uncommon in the United States, but have been reported from fairs (zoonotic transmission) as well as at camps where participants have close social contact in communal housing. International importation can also be a contributing factor. NORS collects information on certain respiratory diseases and could serve as a platform to monitor mass gathering-related respiratory outbreaks in the future. |
Beyond early infant diagnosis: case finding strategies for identification of HIV-infected infants and children
Ahmed S , Kim MH , Sugandhi N , Phelps BR , Sabelli R , Diallo MO , Young P , Duncan D , Kellerman SE . AIDS 2013 27 Suppl 2 S235-45 There are 3.4 million children infected with HIV worldwide, with up to 2.6 million eligible for treatment under current guidelines. However, roughly 70% of infected children are not receiving live-saving HIV care and treatment. Strengthening case finding through improved diagnosis strategies, and actively linking identified HIV-infected children to care and treatment is essential to ensuring that these children benefit from the care and treatment available to them. Without attention or advocacy, the majority of these children will remain undiagnosed and die from complications of HIV. In this article, we summarize the challenges of identifying HIV-infected infants and children, review currently available evidence and guidance, describe promising new strategies for case finding, and make recommendations for future research and interventions to improve identification of HIV-infected infants and children. |
Linkage, initiation and retention of children in the antiretroviral therapy cascade: an overview
Phelps BR , Ahmed S , Amzel A , Diallo MO , Jacobs T , Kellerman SE , Kim MH , Sugandhi N , Tam M , Wilson-Jones M . AIDS 2013 27 Suppl 2 S207-13 In 2012, there were an estimated 2 million children in need of antiretroviral therapy (ART) in the world, but ART is still reaching fewer than 3 in 10 children in need of treatment. [1, 7] As more HIV-infected children are identified early and universal treatment is initiated in children under 5 regardless of CD4, the success of pediatric HIV programs will depend on our ability to link children into care and treatment programs, and retain them in those services over time. In this review, we summarize key individual, institutional, and systems barriers to diagnosing children with HIV, linking them to care and treatment, and reducing loss to follow-up (LTFU). We also explore how linkage and retention can be optimally measured so as to maximize the impact of available pediatric HIV care and treatment services. |
PEPFAR scale-up of pediatric HIV services: innovations, achievements, and challenges
Abrams EJ , Simonds RJ , Modi S , Rivadeneira E , Vaz P , Kankasa C , Tindyebwa D , Phelps BR , Bowsky S , Teasdale CA , Koumans E , Ruff AJ . J Acquir Immune Defic Syndr 2012 60 Suppl 3 S105-12 HIV/AIDS has had a profound impact on children around the world since the start of the epidemic. There are currently 3.4 million children under the age of 15 years living with HIV globally, and more than 450,000 children currently receiving lifesaving antiretroviral treatment. This article describes efforts supported by the President's Emergency Plan for AIDS Relief (PEPFAR) to expand access to treatment for children living with HIV in high-burden countries. The article also highlights a series of case studies that illustrate the impact that the PEPFAR initiative has had on the pediatric HIV epidemic. Through its support of host governments and partner organizations, the PEPFAR initiative has expanded HIV testing and treatment for pregnant women to reduce vertical transmission of HIV, increased access to early infant diagnosis for HIV-exposed infants, improved training and resources for clinicians who provide pediatric care and antiretroviral treatment, and, through public-private partnerships with pharmaceutical manufacturers, helped increase the number of medications available for the treatment of HIV-infected children in resource-limited settings. |
Progress, challenges, and new opportunities for the prevention of mother-to-child transmission of HIV under the US President's Emergency Plan for AIDS Relief
Chi BH , Adler MR , Bolu O , Mbori-Ngacha D , Ekouevi DK , Gieselman A , Chipato T , Luo C , Phelps BR , McClure C , Mofenson LM , Stringer JS . J Acquir Immune Defic Syndr 2012 60 Suppl 3 S78-87 In June 2011, the Joint United Nations Programme on HIV/AIDS, the US President's Emergency Plan for AIDS Relief (PEPFAR), and other collaborators outlined a transformative plan to virtually eliminate pediatric AIDS worldwide. The ambitious targets of this initiative included a 90% reduction in new pediatric HIV infections and a 50% reduction in HIV-related maternal mortality--all by 2015. PEPFAR has made an unprecedented commitment to the expansion and improvement of prevention of mother-to-child HIV transmission (PMTCT) services globally and is expected to play a critical role in reaching the virtual elimination target. To date, PEPFAR has been instrumental in the success of many national programs, including expanded coverage of PMTCT services, an enhanced continuum of care between PMTCT and HIV care and treatment, provision of more efficacious regimens for antiretroviral prophylaxis, design of innovative but simplified PMTCT approaches, and development of new strategies to evaluate program effectiveness. These accomplishments have been made through collaborative efforts with host governments, United Nations agencies, other donors (eg, the Global Fund for AIDS, Tuberculosis, and Malaria), nongovernmental organizations, and private sector partners. To successfully meet the ambitious global targets to prevent new infant HIV infections, PEPFAR must continue to leverage the existing PMTCT platform, while developing innovative approaches to rapidly expand quality HIV services. PEPFAR must also carefully integrate PMTCT into the broader combination prevention agenda for HIV, so that real progress can be made toward an "AIDS-free generation" worldwide. |
Prevalence of healthcare-associated infections in acute care hospitals in Jacksonville, Florida
Magill SS , Hellinger W , Cohen J , Kay R , Bailey C , Boland B , Carey D , Guzman J , Dominguez K , Edwards J , Goraczewski L , Horan T , Miller M , Phelps M , Saltford R , Seibert J , Smith B , Starling P , Viergutz B , Walsh K , Rathore M , Guzman N , Fridkin S . Infect Control Hosp Epidemiol 2012 33 (3) 283-91 OBJECTIVE: To determine healthcare-associated infection (HAI) prevalence in 9 hospitals in Jacksonville, Florida; to evaluate the performance of proxy indicators for HAIs; and to refine methodology in preparation for a multistate survey. DSESIGN: Point prevalence survey. PATIENTS: Acute care inpatients of any age. METHODS: HAIs were defined using National Healthcare Safety Network criteria. In each facility a trained primary team (PT) of infection prevention (IP) staff performed the survey on 1 day, reviewing records and collecting data on a random sample of inpatients. PTs assessed patients with one or more proxy indicators (abnormal white blood cell count, abnormal temperature, or antimicrobial therapy) for the presence of HAIs. An external IP expert team collected data from a subset of patient records reviewed by PTs to assess proxy indicator performance and PT data collection. RESULTS: Of 851 patients surveyed by PTs, 51 had one or more HAIs (6.0%; 95% confidence interval, 4.5%-7.7%). Surgical site infections ([Formula: see text]), urinary tract infections ([Formula: see text]), pneumonia ([Formula: see text]), and bloodstream infections ([Formula: see text]) accounted for 75.8% of 58 HAIs detected by PTs. Staphylococcus aureus was the most common pathogen, causing 9 HAIs (15.5%). Antimicrobial therapy was the most sensitive proxy indicator, identifying 95.5% of patients with HAIs. CONCLUSIONS: HAI prevalence in this pilot was similar to that reported in the 1970s by the Centers for Disease Control and Prevention's Study on the Efficacy of Nosocomial Infection Control. Antimicrobial therapy was a sensitive screening variable with which to identify those patients at higher risk for infection and reduce data collection burden. Additional work is needed on validation and feasibility to extend this methodology to a national scale. |
Partnerships for environmental and occupational justice: contributions to research, capacity and public health
Baron S , Sinclair R , Payne-Sturges D , Phelps J , Zenick H , Collman GW , O'Fallon LR . Am J Public Health 2009 99 S517-S525 In 1994, the National Institute of Environmental Health Sciences (NIEHS) initiated a program to address communication gaps between community residents, researchers and health care providers in the context of disproportionate environmental exposures. Over 13 years, together with the Environmental Protection Agency and National Institute for Occupational Health and Safety, NIEHS funded 54 environmental justice projects. Here we examine the methods used and outcomes produced based on data gathered from summaries submitted for annual grantees' meetings. Data highlight how projects fulfilled program objectives of improving community awareness and capacity and the positive public health and public policy outcomes achieved. Our findings underscore the importance of community participation in developing effective, culturally sensitive interventions and emphasize the importance of systematic program planning and evaluation. |
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