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American Journal of Tropical Medicine and Hygiene

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https://www.readbyqxmd.com/read/28093544/annual-incidence-of-lassa-virus-infection-in-southern-mali
#1
David Safronetz, Nafomon Sogoba, Sory Ibrahim Diawara, Sidy Bane, Kyle Rosenke, Ousmane Maiga, Matt Boisen, Robert F Garry, Luis M Branco, L Robbin Lindsay, Sékou F Traoré, Heinz Feldmann, Seydou Doumbia
Previously, we reported a high seroprevalence rate of Lassa virus antibodies in inhabitants of three villages in southern Mali where infected rodents have been demonstrated. Herein, we report a 1-year follow-up study in which we were able to collect a second blood samples from 88.7% of participants of the same cohort. We identified 23 seroconversions for IgG antibodies reactive against Lassa virus, representing an incidence of 6.3% (95% confidence interval = 3.8-8.8%). Seroconversion was frequently seen in preteenage children (12/23, 51...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093543/intestinal-parasite-infections-and-accuracy-of-direct-thin-and-thick-smear-formol-ether-sedimentation-centrifugal-flotation-and-mini-flotac-techniques-among-patients-with-gastrointestinal-tract-disorders-from-the-greater-cairo-region-egypt
#2
Atef H Hussein, Samia M Rashed, Ibrahim A El-Hayawan, Nagwa S Ali, Eman A Abou Ouf, Amira T Ali
The aim of the present study was to assess the frequency of intestinal parasitic infection among patients with gastrointestinal tract disorders from the Greater Cairo region, Egypt. In addition, a comparison was made of the accuracy of direct thin and thick smear, formol-ether sedimentation (FEC), centrifugal flotation (CF), and mini-FLOTAC techniques in the diagnosis of infection. Out of 100 patients, the overall prevalence of parasitic infection was 51%. Only 6% had dual infection. Giardia lamblia was the most common parasite (26%), followed by Hymenolepis nana (20%), Entamoeba coli (8%), and Enterobius vermicularis (3%)...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093542/disease-burden-of-dengue-in-the-philippines-adjusting-for-underreporting-by-comparing-active-and-passive-dengue-surveillance-in-punta-princesa-cebu-city
#3
Eduardo A Undurraga, Frances E Edillo, Jonathan Neil V Erasmo, Maria Theresa P Alera, In-Kyu Yoon, Francisco M Largo, Donald S Shepard
Dengue virus (DENV) is a serious threat to public health. Having reliable estimates of the burden of dengue is important to inform policy and research, but surveillance systems are not designed to capture all symptomatic DENV infections. We derived the rate of reporting of dengue by comparing active surveillance of symptomatic DENV infections in a prospective community-based seroepidemiological cohort study (N = 1008) of acute febrile illness in Punta Princesa, Cebu City, Philippines, with passive surveillance data from the Cebu City Health Department...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093541/association-of-toll-like-receptor-3-and-toll-like-receptor-9-single-nucleotide-polymorphisms-with-hepatitis-c-virus-infection-and-hepatic-fibrosis-in-egyptian-patients
#4
Rania A Zayed, Dalia Omran, Doha A Mokhtar, Zinab Zakaria, Sameera Ezzat, Mohamed A Soliman, Lamiaa Mobarak, Hossam El-Sweesy, Ghada Emam
Toll-like receptors (TLRs) are recognized as fundamental contributors to the immune system function against infections. Hepatitis C virus (HCV) infection represents a global health problem especially in Egypt having the highest HCV prevalence worldwide where HCV infection is a continuing epidemic. The aim of the present study was to investigate the possible association between genetic variation in TLR-3 and TLR-9 and HCV infection and hepatic fibrosis in chronic HCV-positive Egyptian patients. The present study included 100 naïve chronic HCV-positive patients and 100 age- and sex-matched healthy controls...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093540/human-granulocytic-anaplasmosis-as-a-cause-of-febrile-illness-in-korea-since-at-least-2006
#5
Jongyoun Yi, Kye-Hyung Kim, Mee Kyung Ko, Eun Yup Lee, Su Jin Choi, Myoung-Don Oh
Human granulocytic anaplasmosis (HGA) is a tick-borne rickettsial zoonosis with fever, thrombocytopenia, and leukopenia. HGA has been reported in Korea in 2013 but it is uncertain how long it has existed. A retrospective study was conducted on patients who underwent bone marrow examination due to fever and cytopenia, with no clear hematologic or microbiologic causes, from 2003 through 2012. Laboratory diagnosis was made by detecting 16S rRNA genes of Anaplasma phagocytophilum from the stored blood samples. Among the 70 patients, five (7...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093539/leishmaniasis-in-thailand-a-review-of-causative-agents-and-situations
#6
REVIEW
Saovanee Leelayoova, Suradej Siripattanapipong, Jipada Manomat, Phunlerd Piyaraj, Peerapan Tan-Ariya, Lertwut Bualert, Mathirut Mungthin
Before 1999, leishmaniasis was considered an imported disease in Thailand. Since then, autochthonous leishmaniasis was reported in both immmunocompetent and immmunocompromised patients especially in human immunodeficiency virus (HIV)/acquired immunodeficiency syndrome (AIDS). A new species was identified and named as Leishmania siamensis consisting of two lineages, that is, lineages TR and PG. Analysis of isoenzymes has clarified the more commonly detected L. siamensis lineage PG as Leishmania martiniquensis (MON-229), a species originally reported from the Martinique Island, whereas the L...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093538/prevalence-and-determinants-of-cryptosporidium-infection-in-an-underdeveloped-rural-region-of-southwestern-china
#7
Ya Yang, Yibiao Zhou, Wanting Cheng, Xiang Pan, Penglei Xiao, Yan Shi, Jianchuan Gao, Xiuxia Song, Yue Chen, Qingwu Jiang
Few studies have focused on the epidemiology of Cryptosporidium in resource-challenged settings in China. We report a community-based cross-sectional study to investigate the prevalence of Cryptosporidium infection and its risk factors and associations with hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) infections. The prevalence of Cryptosporidium infection was 12.6% (95% confidence interval = 11.0-14.3). Individuals living in households with ≥ 5 family members and raising domestic pigs tended to have a greater risk of Cryptosporidium infection...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093537/dengue-epidemic-in-postconflict-swat-district-khyber-pakhtunkhwa-pakistan-2013
#8
Mamoona Chaudhry, Saeed Ahmad, Hamad Bin Rashid, Iftikhar Ud Din
Swat, a lush green valley of 1.3 million persons, remained under militant insurgency from 2007 to 2009, which damaged the health infrastructure. An outbreak of dengue fever (DF) was declared in the valley in 2013. To investigate this outbreak, we established active surveillance of national hospitals and private clinics, reviewed available clinical and laboratory records, and conducted entomological survey. From August to November 2013, 16,000 suspected patients with acute febrile illness were presented to health facilities...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093536/noma-overview-of-a-neglected-disease-and-human-rights-violation
#9
REVIEW
M Leila Srour, Klaas Marck, Denise Baratti-Mayer
Noma is an orofacial gangrene affecting malnourished children and mainly observed in tropical countries, particularly sub-Saharan Africa. Epidemiological data on noma are scarce, but a current estimate of the global incidence is 30,000-40,000 cases per year, with a mortality rate of approximately 85% and a burden of disease calculated to be a loss of 1-10 million disability-adjusted life years. The etiology of noma is multifactorial with malnutrition as an ever present factor, often in combination with concomitant diseases, such as measles, malaria, and human immunodeficiency virus (HIV), and poor oral hygiene...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093535/hepatitis-e-in-singapore-a-case-series-and-viral-phylodynamics-study
#10
Esmeralda Chi-Yuan Teo, Boon-Huan Tan, Michael A Purdy, Pui-San Wong, Pei-Jun Ting, Pik-Eu Jason Chang, Lynette Lin-Ean Oon, Amanda Sue, Chong-Gee Teo, Chee-Kiat Tan
The incidence of hepatitis E in Singapore appears to be increasing. A retrospective case-series study of patients diagnosed with hepatitis E in a tertiary hospital from 2009 to 2013 was conducted. Of 16 cases, eight (50%) were solid-organ transplant recipients (SOTRs), and 14 (88%) were found infected by genotype 3 hepatitis E virus (HEV-3). Bayesian inferences based on HEV subgenomic sequences from seven cases suggest that HEV-3 strains were introduced to Singapore as two principal lineages. Within limitations of the study, it can be inferred that one lineage, in the 3efg clade, emerged about 83 years ago, probably originating from Japan, whereas the other, in the 3abchij clade, emerged about 40 years ago, from the United States...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093534/the-role-of-adherence-on-the-impact-of-a-school-based-water-sanitation-and-hygiene-intervention-in-mali
#11
Joshua V Garn, Victoria Trinies, Jérémie Toubkiss, Matthew C Freeman
Studies assessing the impacts of school-based water, sanitation, and hygiene (WASH) interventions have revealed inconsistent improvements in pupils' health and educational outcomes. This may be in part due to suboptimal project fidelity or adherence. As part of a matched-control trial of a comprehensive school-based WASH project in Mali, we measured the degree to which schools met four prespecified WASH targets, comprised of 15 criteria, 0-3 years after program implementation. We compared achievement of the targets and criteria between beneficiary and matched control schools, and compared achievement within beneficiary schools at baseline and at follow-up visits...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093533/effect-of-deworming-on-indices-of-health-cognition-and-education-among-schoolchildren-in-rural-china-a-cluster-randomized-controlled-trial
#12
Chengfang Liu, Louise Lu, Linxiu Zhang, Renfu Luo, Sean Sylvia, Alexis Medina, Scott Rozelle, Darvin Scott Smith, Yingdan Chen, Tingjun Zhu
Soil-transmitted helminths (STHs) infect over one billion people worldwide. There is concern that chronic infection with STHs among school-aged children may detrimentally affect their development, including their health, cognition, and education. However, two recent Cochrane reviews examining the impact of deworming drugs for STH on nutrition, hemoglobin, and school performance found that randomized controlled trials (RCTs) in the literature provide an insufficient evidence base to draw reliable conclusions...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28093532/soil-ingestion-is-associated-with-child-diarrhea-in-an-urban-slum-of-nairobi-kenya
#13
Valerie Bauza, R M Ocharo, Thanh H Nguyen, Jeremy S Guest
Diarrhea is a leading cause of mortality in children under 5 years of age. We conducted a cross-sectional study of 54 children aged 3 months to 5 years old in Kibera, an urban slum in Nairobi, Kenya, to assess the relationship between caregiver-reported soil ingestion and child diarrhea. Diarrhea was significantly associated with soil ingestion (adjusted odds ratio = 9.9, 95% confidence interval = 2.1-47.5). Soil samples from locations near each household were also collected and analyzed for Escherichia coli and a human-associated Bacteroides fecal marker (HF183)...
January 16, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070013/epidemiology-of-echinococcosis-among-schoolchildren-in-golog-tibetan-autonomous-prefecture-qinghai-china
#14
Huixia Cai, Yayi Guan, Xiao Ma, Liying Wang, Hu Wang, Guoming Su, Xuefei Zhang, Xiumin Han, Junying Ma, Yu Fang Liu, Jun Li, Jingxiao Zhang, Yongshun Wang, Wei Wang, Rui Du, Wen Lei, Weiping Wu
Echinococcosis is a serious zoonotic parasitic disease that is highly endemic in Qinghai Province. The present study aimed to investigate the prevalence of echinococcosis among schoolchildren in Golog Tibetan Autonomous Prefecture to improve early diagnosis and treatment of patients and to provide information for echinococcosis prevention and control. A total of 11,260 schoolchildren from five counties (Maqin, Gander, Dari, Jiuzhi, and Banma) in Golog Tibetan Autonomous Prefecture, Qinghai Province, were screened for echinococcosis...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070012/prevalence-and-risk-factors-for-intestinal-parasitic-infection-in-schoolchildren-in-battambang-cambodia
#15
Chien-Wei Liao, Kuan-Chih Chiu, I-Chen Chiang, Po-Ching Cheng, Ting-Wu Chuang, Juo-Han Kuo, Yun-Hung Tu, Chia-Kwung Fan
Most intestinal parasitic infections (IPIs), commonly endemic in tropical resource-poor developing countries, are neglected tropical diseases. Parasitic infections and malnutrition are most commonly found in children. We determined the prevalence of IPIs and the risk factors in Battambang Province, northwestern Cambodia, from August to September 2015. This study collected 308 valid questionnaires and specimens from Dontri (173, 56.2%) and Kon Kaêk (135, 43.8%) primary schools. All stool samples were examined using Chang's Feces Examination Apparatus through the merthiolate-iodine-formaldehyde technique...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070011/management-of-advanced-hepatic-alveolar-echinococcosis-report-of-42-cases
#16
Bo Qu, Long Guo, Guannan Sheng, Fei Yu, Guannan Chen, Yupeng Wang, Yuan Shi, Hanxiang Zhan, Yi Yang, Xiaoyan Du
Radical resection is the first choice for hepatic alveolar echinococcosis (HAE). However, many patients with advanced HAE have no chance to be treated with curative resection owing to the long clinical latency. This study aimed to evaluate the necessity of aggressive operations, like palliative resection and orthotopic liver transplantation (OLT), in the management of advanced HAE. A retrospective study analyzed 42 patients with advanced HAE treated with palliative resection (N = 15), palliative nonresective procedures (N = 13), OLT (N = 3), or albendazole therapy alone (N = 11)...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070010/low-level-of-hepatitis-b-virus-infection-in-children-20-years-after-initiation-of-infant-vaccination-program-in-wallis-and-futuna
#17
Lorenzo Pezzoli, Jean Pierre Mathelin, Karen Hennessey, Padmasiri Eswara-Aratchige, Jayaprakash Valiakolleri, Sung Hye Kim
The prevalence of hepatitis B virus (HBV) in Wallis and Futuna (WAF) was one of the highest in the Pacific and was the driving factor for introducing hepatitis B (HepB) vaccination in 1992 and HepB birth dose (HepB-BD) in 2006. Using transmission assessment survey (TAS) as a survey platform for eliminating lymphatic filariasis (LF), we assessed HBV surface antigen (HBsAg) seroprevalence, HepB vaccination coverage, and its timeliness among schoolchildren in WAF. From one finger prick of all registered fourth and fifth grade students, we tested HBsAg and filariasis antigen simultaneously, and estimated HepB vaccination coverage and timeliness by reviewing students' immunization cards...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070009/a-malaria-ecology-index-predicted-spatial-and-temporal-variation-of-malaria-burden-and-efficacy-of-antimalarial-interventions-based-on-african-serological-data
#18
Gordon C McCord, Jesse K Anttila-Hughes
Reducing the global health burden of malaria is complicated by weak reporting systems for infectious diseases and a paucity of vital statistics registration. This limits our ability to predict changes in malaria health burden intensity, target antimalarial resources where needed, and identify malaria impacts in retrospective data. We refined and deployed a temporally and spatially varying Malaria Ecology Index (MEI) incorporating climatological and ecological data to estimate malaria transmission strength and validate it against cross-sectional serology data from 39,875 children from seven sub-Saharan African countries...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070008/expert-reliability-for-the-world-health-organization-standardized-ultrasound-classification-of-cystic-echinococcosis
#19
Nadia Solomon, Paul J Fields, Francesca Tamarozzi, Enrico Brunetti, Calum N L Macpherson
Cystic echinococcosis (CE), a parasitic zoonosis, results in cyst formation in the viscera. Cyst morphology depends on developmental stage. In 2003, the World Health Organization (WHO) published a standardized ultrasound (US) classification for CE, for use among experts as a standard of comparison. This study examined the reliability of this classification. Eleven international CE and US experts completed an assessment of eight WHO classification images and 88 test images representing cyst stages. Inter- and intraobserver reliability and observer performance were assessed using Fleiss' and Cohen's kappa...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28070007/first-evidence-of-angiostrongyliasis-caused-by-angiostrongylus-cantonensis-in-guadeloupe-lesser-antilles
#20
Céline Dard, Jean-Eudes Piloquet, Yvonne Qvarnstrom, LeAnne M Fox, Helmi M'kada, Jean-Christophe Hebert, Didier Mattera, Dorothée Harrois
Infection by the rat lungworm Angiostrongylus cantonensis represents the most common cause of infectious eosinophilic meningitis in humans, causing central nervous system (CNS) angiostrongyliasis. Most of CNS angiostrongyliasis cases were described in Asia, Pacific Basin, Australia, and some limited parts of Africa and America. CNS angiostrongyliasis has been reported in the Caribbean but never in the Lesser Antilles. The primary objectives of this study were to depict the first case of CNS angiostrongyliasis in the Lesser Antilles and investigate the environmental presence of A...
January 9, 2017: American Journal of Tropical Medicine and Hygiene
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