Allen G P Ross1, Remigio M Olveda2, Donald P McManus3, Donald A Harn4, Delia Chy5, Yuesheng Li3, Veronica Tallo2, Shu-Kay Ng6. 1. Menzies Health Institute Queensland, Griffith University, Southport, Queensland, Australia. Electronic address: a.ross@griffith.edu.au. 2. Research Institute for Tropical Medicine, Department of Health, Muntinlupa, Philippines. 3. QIMR Berghofer Medical Research Institute, Brisbane, Queensland, Australia. 4. The Center for Tropical and Emerging Global Health Diseases, University of Georgia, Athens, Georgia, USA. 5. Municipal Medical Officer of Health, Palapag, Northern Samar, Philippines. 6. Menzies Health Institute Queensland, Griffith University, Southport, Queensland, Australia.
Abstract
BACKGROUND: A cross-sectional survey was performed in 2012 among 18 rural barangays in Northern Samar, the Philippines in order to determine the prevalence of single and multiple species helminth infections and the underlying risk factors of acquiring one or more parasites. METHODS: A total of 6976 participants who completed a medical questionnaire and provided a stool sample for examination were included in the final analysis. RESULTS: The overall prevalence rates of Schistosoma japonicum, Ascaris lumbricoides, Trichuris trichiura, and hookworm were found to be moderate to high at 28.9%, 36.5%, 61.8%, and 28.4%, respectively. However, the prevalence of harbouring any of the helminths was found to be higher at 75.6%. Significant variation was evident among the predicted barangay-specific random effects for infection with S. japonicum (barangay variance of 0.66, 95% confidence interval 0.31-1.40) and for any helminth infection (barangay variance of 0.63, 95% confidence interval 0.30-1.29). The predictive models showed, with greater than 80% sensitivity and specificity, that low socio-economic status, low levels of education, poor sanitation, proximity to water sources, occupation (i.e., farming and fishing), and male sex were all reliable indicators of infection status. CONCLUSIONS: This study will aid in the targeting of limited resources for national treatment and WASH (water, sanitation, and hygiene) efforts in low- and middle-income countries.
BACKGROUND: A cross-sectional survey was performed in 2012 among 18 rural barangays in Northern Samar, the Philippines in order to determine the prevalence of single and multiple species helminth infections and the underlying risk factors of acquiring one or more parasites. METHODS: A total of 6976 participants who completed a medical questionnaire and provided a stool sample for examination were included in the final analysis. RESULTS: The overall prevalence rates of Schistosoma japonicum, Ascaris lumbricoides, Trichuris trichiura, and hookworm were found to be moderate to high at 28.9%, 36.5%, 61.8%, and 28.4%, respectively. However, the prevalence of harbouring any of the helminths was found to be higher at 75.6%. Significant variation was evident among the predicted barangay-specific random effects for infection with S. japonicum (barangay variance of 0.66, 95% confidence interval 0.31-1.40) and for any helminth infection (barangay variance of 0.63, 95% confidence interval 0.30-1.29). The predictive models showed, with greater than 80% sensitivity and specificity, that low socio-economic status, low levels of education, poor sanitation, proximity to water sources, occupation (i.e., farming and fishing), and male sex were all reliable indicators of infection status. CONCLUSIONS: This study will aid in the targeting of limited resources for national treatment and WASH (water, sanitation, and hygiene) efforts in low- and middle-income countries.
Authors: Marianette T Inobaya; Thao N Chau; Shu-Kay Ng; Colin MacDougall; Remigio M Olveda; Veronica L Tallo; Jhoys M Landicho; Carol M Malacad; Mila F Aligato; Jerric B Guevarra; Allen G Ross Journal: Parasit Vectors Date: 2018-07-31 Impact factor: 3.876
Authors: Kosala Gayan Weerakoon; Catherine A Gordon; Gail M Williams; Pengfei Cai; Geoffrey N Gobert; Remigio M Olveda; Allen G Ross; David U Olveda; Donald P McManus Journal: Infect Dis Poverty Date: 2018-12-10 Impact factor: 4.520
Authors: Mary Lorraine S Mationg; Gail M Williams; Veronica L Tallo; Remigio M Olveda; Eindra Aung; Portia Alday; Mark Donald Reñosa; Chona Mae Daga; Jhoys Landicho; Maria Paz Demonteverde; Eunice Diane Santos; Thea Andrea Bravo; Franziska Angly Bieri; Yuesheng Li; Archie C A Clements; Peter Steinmann; Kate Halton; Donald E Stewart; Donald P McManus; Darren J Gray Journal: PLoS Negl Trop Dis Date: 2021-12-22
Authors: Donald P McManus; Darren J Gray; Mary Lorraine S Mationg; Veronica L Tallo; Gail M Williams; Catherine A Gordon; Archie C A Clements Journal: Infect Dis Poverty Date: 2021-06-12 Impact factor: 10.485