Last data update: Oct 07, 2024. (Total: 47845 publications since 2009)
Records 1-6 (of 6 Records) |
Query Trace: Sapchookul P[original query] |
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Influenza virus circulation and vaccine effectiveness during June 2021–May 2023 in Thailand
Prasert K , Praphasiri P , Nakphook S , Ditsungnoen D , Sapchookul P , Sornwong K , Naosri S , Akkapaiboon Okada P , Suntarattiwong P , Chotpitayasunondh T , Montgomery MP , Davis WW , Pittayawonganon C . Vaccine X 2024 19 Thai Ministry of Public Health recommends influenza vaccination for certain risk groups. We evaluated 2023 Southern Hemisphere influenza vaccine effectiveness against medically attended influenza using surveillance data from nine Thai hospitals and a test-negative design. During June 2022–May 2023, influenza vaccine provided moderate protection against seeking care for influenza illness (adjusted vaccine effectiveness 51%; 95% confidence interval 28–67). Understanding vaccine effectiveness can help guide future antigen selection and support clinicians to make a strong influenza vaccine recommendation to patients. © 2024 The Author(s) |
Characteristics, risk factors, and outcomes related to Zika virus infection during pregnancy in Northeastern Thailand: A prospective pregnancy cohort study, 2018-2020
Wongsawat J , Thamthitiwat S , Hicks VJ , Uttayamakul S , Teepruksa P , Sawatwong P , Skaggs B , Mock PA , MacArthur JR , Suya I , Sapchookul P , Kitsutani P , Lo TQ , Vachiraphan A , Kovavisarach E , Rhee C , Darun P , Saepueng K , Waisaen C , Jampan D , Sriboonrat P , Palanuwong B , Sukbut P , Areechokchai D , Pittayawonganon C , Iamsirithaworn S , Bloss E , Rao CY . PLoS Negl Trop Dis 2024 18 (5) e0012176 BACKGROUND: In response to the 2015-2016 Zika virus (ZIKV) outbreak and the causal relationship established between maternal ZIKV infection and adverse infant outcomes, we conducted a cohort study to estimate the incidence of ZIKV infection in pregnancy and assess its impacts in women and infants. METHODOLOGY/PRINCIPAL FINDINGS: From May 2018-January 2020, we prospectively followed pregnant women recruited from 134 participating hospitals in two non-adjacent provinces in northeastern Thailand. We collected demographic, clinical, and epidemiologic data and blood and urine at routine antenatal care visits until delivery. ZIKV infections were confirmed by real-time reverse transcriptase polymerase chain reaction (rRT-PCR). Specimens with confirmed ZIKV underwent whole genome sequencing. Among 3,312 women enrolled, 12 (0.36%) had ZIKV infections, of which two (17%) were detected at enrollment. Ten (83%, 3 in 2nd and 7 in 3rd trimester) ZIKV infections were detected during study follow-up, resulting in an infection rate of 0.15 per 1,000 person-weeks (95% CI: 0.07-0.28). The majority (11/12, 91.7%) of infections occurred in one province. Persistent ZIKV viremia (42 days) was found in only one woman. Six women with confirmed ZIKV infections were asymptomatic until delivery. Sequencing of 8 ZIKV isolates revealed all were of Asian lineage. All 12 ZIKV infected women gave birth to live, full-term infants; the only observed adverse birth outcome was low birth weight in one (8%) infant. Pregnancies in 3,300 ZIKV-rRT-PCR-negative women were complicated by 101 (3%) fetal deaths, of which 67 (66%) had miscarriages and 34 (34%) had stillbirths. There were no differences between adverse fetal or birth outcomes of live infants born to ZIKV-rRT-PCR-positive mothers compared to live infants born to ZIKV-rRT-PCR-negative mothers. CONCLUSIONS/SIGNIFICANCE: Confirmed ZIKV infections occurred infrequently in this large pregnancy cohort and observed adverse maternal and birth outcomes did not differ between mothers with and without confirmed infections. |
High burden of extended-spectrum beta-lactamase-producing Escherichia coli and Klebsiella pneumoniae bacteremia in older adults: A seven-year study in two rural Thai provinces
Sawatwong P , Sapchookul P , Whistler T , Gregory CJ , Sangwichian O , Makprasert S , Jorakate P , Srisaengchai P , Thamthitiwat S , Promkong C , Nanvatthanachod P , Vanaporn M , Rhodes J . Am J Trop Med Hyg 2019 100 (4) 943-951 Bloodstream infection surveillance conducted from 2008 to 2014 in all 20 hospitals in Sa Kaeo and Nakhon Phanom provinces, Thailand, allowed us to look at disease burden, antibiotic susceptibilities, and recurrent infections caused by extended-spectrum beta-lactamase (ESBL)-producing Escherichia coli and Klebsiella pneumoniae. Of 97,832 blood specimens, 3,338 were positive for E. coli and 1,086 for K. pneumoniae. The proportion of E. coli isolates producing ESBL significantly increased from 19% to 22% in 2008-2010 to approximately 30% from 2011 to 2014 (P-value for trend = 0.02), whereas ESBL production among K. pneumoniae cases was 27.4% with no significant trend over time. Incidence of community-onset ESBL-producing E. coli increased from 5.4 per 100,000 population in 2008 to 12.8 in 2014, with the highest rates among persons aged >/= 70 years at 79 cases per 100,000 persons in 2014. From 2008 to 2014, community-onset ESBL-producing K. pneumoniae incidence was 2.7 per 100,000, with a rate of 12.9 among those aged >/= 70 years. Although most (93.6% of E. coli and 87.6% of K. pneumoniae) infections were community-onset, hospital-onset infections were twice as likely to be ESBL. Population-based surveillance, as described, is vital to accurately monitor emergence and trends in antimicrobial resistance, and in guiding the development of rational antimicrobial therapy recommendations. |
Epidemiology and antimicrobial resistance of invasive non-typhoidal Salmonellosis in rural Thailand from 2006-2014
Whistler T , Sapchookul P , McCormick DW , Sangwichian O , Jorakate P , Makprasert S , Jatapai A , Naorat S , Surin U , Koosakunwat S , Supcharassaeng S , Piralam B , Mikoleit M , Baggett HC , Rhodes J , Gregory CJ . PLoS Negl Trop Dis 2018 12 (8) e0006718 INTRODUCTION: Invasive salmonellosis is a common cause of bloodstream infection in Southeast Asia. Limited epidemiologic and antimicrobial resistance data are available from the region. METHODS: Blood cultures performed in all 20 hospitals in the northeastern province of Nakhon Phanom (NP) and eastern province of Sa Kaeo (SK), Thailand were captured in a bloodstream infection surveillance system. Cultures were performed as clinically indicated in hospitalized patients; patients with multiple positive cultures had only the first included. Bottles were incubated using the BacT/Alert system (bioMerieux, Thailand) and isolates were identified using standard microbiological techniques; all Salmonella isolates were classified to at least the serogroup level. Antimicrobial resistance was assessed using disk diffusion. RESULTS: Salmonella was the fifth most common pathogen identified in 147,535 cultures with 525 cases (211 in Nakhon Phanom (NP) and 314 in Sa Kaeo (SK)). The overall adjusted iNTS incidence rate in NP was 4.0 cases/100,000 person-years (95% CI 3.5-4.5) and in SK 6.4 cases/100,000 person-years (95% CI 5.7-7.1; p = 0.001). The most common serogroups were C (39.4%), D (35.0%) and B (9.9%). Serogroup D predominated in NP (103/211) with 59.2% of this serogroup being Salmonella serovar Enteritidis. Serogroup C predominated in SK (166/314) with 84.3% of this serogroup being Salmonella serovar Choleraesuis. Antibiotic resistance was 68.2% (343/503) for ampicillin, 1.2% (6/482) for ciprofloxacin (or 58.1% (280/482) if both intermediate and resistant phenotypes are considered), 17.0% (87/512) for trimethoprim-sulfamethoxazole, and 12.2% (59/484) for third-generation cephalosporins (cefotaxime or ceftazidime). Multidrug resistance was seen in 99/516 isolates (19.2%). CONCLUSIONS: The NTS isolates causing bloodstream infections in rural Thailand are commonly resistant to ampicillin, cefotaxime, and TMP-SMX. Observed differences between NP and SK indicate that serogroup distribution and antibiotic resistance may substantially differ throughout Thailand and the region. |
Data management and data quality in PERCH, a large international case-control study of severe childhood pneumonia
Watson NL , Prosperi C , Driscoll AJ , Higdon MM , Park DE , Sanza M , DeLuca AN , Awori JO , Goswami D , Hammond E , Hossain L , Johnson C , Kamau A , Kuwanda L , Moore DP , Neyzari O , Onwuchekwa U , Parker D , Sapchookul P , Seidenberg P , Shamsul A , Siazeele K , Srisaengchai P , Sylla M , Levine OS , Murdoch DR , O'Brien KL , Wolff M , Deloria Knoll M . Clin Infect Dis 2017 64 S238-s244 The Pneumonia Etiology Research for Child Health (PERCH) study is the largest multicountry etiology study of pediatric pneumonia undertaken in the past 3 decades. The study enrolled 4232 hospitalized cases and 5325 controls over 2 years across 9 research sites in 7 countries in Africa and Asia. The volume and complexity of data collection in PERCH presented considerable logistical and technical challenges. The project chose an internet-based data entry system to allow real-time access to the data, enabling the project to monitor and clean incoming data and perform preliminary analyses throughout the study. To ensure high-quality data, the project developed comprehensive quality indicator, data query, and monitoring reports. Among the approximately 9000 cases and controls, analyzable laboratory results were available for ≥96% of core specimens collected. Selected approaches to data management in PERCH may be extended to the planning and organization of international studies of similar scope and complexity. |
Molecular characterization of Mycoplasma pneumoniae infections in two rural populations of Thailand from 2009-2012.
Whistler T , Sawatwong P , Diaz MH , Benitez AJ , Wolff BJ , Sapchookul P , Thamthitiwat S , Winchell JM . J Clin Microbiol 2017 55 (7) 2222-2233 Studies on Mycoplasma pneumoniae in Thailand have focused on urban centers and have not included the molecular characterization. In an attempt to provide a more comprehensive understanding of this organism, we conducted a systematic random sampling to identify 3000 nasopharyngeal swab specimens, collected from January 2009 through July 2012 during population-based surveillance for influenza-like illness in two rural provinces. M. pneumoniae was detected by real-time PCR in 175 (5.8%) specimens. Genotyping was performed using the major adhesion protein (P1) and multilocus variable-number tandem-repeat analysis (MLVA). Of the 157 specimens typed, 97 were P1 type 1 and 60 were P1 type 2. Six different MLVA profiles were identified in 149 specimens with 4/5/7/2 (40%) and 3/5/6/2 (26%) predominating. There was no discrete seasonality to M. pneumoniae infections. Examination of the 23S rRNA sequence for known polymorphisms conferring macrolide resistance revealed all 141 tested to possess the genotype associated with macrolide susceptibility. |
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