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Publication Open Access Application of smart phone in "Better Border Healthcare Program": a module for mother and child care(2010-11) Jaranit Kaewkungwal; จรณิต แก้วกังวาล; Pratap Singhasivanon; ประตาป สิงหศิวานนท์; Amnat Khamsiriwatchara; อำนาจ คำศิริวัชรา; Surasak Sawang; Pongthep Meankaew; พงษ์เทพ เมียนแก้ว; Apisit Wechsart; Jaranit Kaewkungwal; Mahidol University. Faculty of Tropical Mediicine. Department of Tropical Hygienecombining web-based and mobile technology was developed to generate ANC/EPI visit schedule dates in which the healthcare personnel can cross-check, identify and update the mother's ANC and child's EPI status at the healthcare facility or at the householdPublication Open Access Artemisinin resistance containment project in Thailand. (I): Implementation of electronic-based malaria information system for early case detection and individual case management in provinces along the Thai-Cambodian border(2012-07-29) Amnat Khamsiriwatchara; Prayuth Sudathip; Surasak Sawang; Saowanit Vijakadge; Thanapon Potithavoranan; Aumnuyphan Sangvichean; Wichai Satimai; Delacollette, Charles; Pratap Singhasivanon; ประตาป สิงหศิวานนท์; Saranath Lawpoolsri; สารนาถ ล้อพูลศรี; Jaranit Kaewkungwal; จรณิต แก้วกังวาล; Jaranit Kaewkungwal; Mahidol University. Faculty of Tropical Medicine. Department of Tropical Hygiene; Mahidol University. Faculty of Tropical Medicine. Center of Excellence for Biomedical and Public Health Informatics.were scattered mostly along the border villages. The mobile technology application has detected different follow-up rates, with particularly low rates among seasonal and cross-border migrants. CONCLUSION: The eMIS demonstrated that it could capturePublication Open Access The epidemiology of subclinical malaria infections in South‑East Asia: findings from cross‑sectional surveys in Thailand– Myanmar border areas, Cambodia, and Vietnam(2015) Mallika Imwong; Nguyen, Thuy Nhien; Rupam Tripura; Peto, Tom J.; Lee, Sue J.; Lwin, Khin Maung; Preyanan Suangkanarat; Atthanee Jeeyapant; Benchawan Vihokhern; Klanarong Wongsaen; Hue, Dao Van; Dong, Le Thanh; Nguyen, Tam‑Uyen; Yoel Lubell; Seidlein, Lorenz von; Mehul Dhorda; Cholrawee Promnarate; Georges Snounou; Benoit Malleret; Laurent Rénia; Lilly Keereecharoen; Pratap Singhasivanon; Pasathorn Sirithiranont; Jem Chalk; Chea Nguon; Hien, Tran Tinh; Nicholas Day; White, Nicholas J.; Arjen Dondorp; Francois Nosten; Mahidol University. Faculty of Tropical Medicine. Mahidol Oxford Research UnitBackground: The importance of the submicroscopic reservoir of Plasmodium infections for malaria elimination depends on its size, which is generally considered small in low transmission settings. The precise estimation of this reservoir requires more sensitive parasite detection methods. The prevalence of asymptomatic, sub-microscopic malaria was assessed by a sensitive, high blood volume quantitative real-time polymerase chain reaction method in three countries of the Greater Mekong Sub-region. Methods: Cross-sectional surveys were conducted in three villages in western Cambodia, four villages along the Thailand–Myanmar border and four villages in southwest Vietnam. Malaria parasitaemia was assessed by Plasmodium falciparum/pan malaria rapid diagnostic tests (RDTs), microscopy and a high volume ultra-sensitive real-time polymerase chain reaction (HVUSqPCR: limit of detection 22 parasites/mL). All villagers older than 6 months were invited to participate. Results: A census before the surveys identified 7355 residents in the study villages. Parasite prevalence was 224/5008 (4 %) by RDT, 229/5111 (5 %) by microscopy, and 988/4975 (20 %) when assessed by HVUSqPCR. Of these 164 (3 %) were infected with P. falciparum, 357 (7 %) with Plasmodium vivax, 56 (1 %) with a mixed infection, and 411 (8 %) had parasite densities that were too low for species identification. A history of fever, male sex, and age of 15 years or older were independently associated with parasitaemia in a multivariate regression model stratified by site. Conclusion: Light microscopy and RDTs identified only a quarter of all parasitaemic participants. The asymptomatic Plasmodium reservoir is considerable, even in low transmission settings. Novel strategies are needed to eliminate this previously under recognized reservoir of malaria transmission.Publication Open Access Artemisinin resistance containment project in Thailand. II: Responses to mefloquine-artesunate combination therapy among falciparum malaria patients in provinces bordering Cambodia(2012-08-28) Wichai Satimai; Prayuth Sudathip; Saowanit Vijaykadga; Amnat Khamsiriwatchara; อำนาจ คำศิริวัชรา; Surasak Sawang; Thanapon Potithavoranan; Aumnuyphan Sangvichean; Delacollette, Charles; Pratap Singhasivanon; ประตาป สิงหศิวานนท์; Jaranit Kaewkungwal; จรณิต แก้วกังวาล; Saranath Lawpoolsri; สารนาถ ล้อพูลศรี; Saranath Lawpoolsri; Mahidol University. Faculty of Tropical Medicine. Department of Tropical Hygiene; Mahidol University. Faculty of Tropical Medicine. Center of Excellence for Biomedical and Public Health Informatics (BIOPHICS)BACKGROUND: The area along the Thai-Cambodian border is considered an epicenter of anti-malarial drug resistance. Recently, parasite resistance to artemisinin-based therapies has been reported in the area. The artemisinin resistance containment project was initiated in November 2008, with the aim to limit resistant parasites and eliminate malaria in this region. This study describes the response to artemisinin-based therapy among falciparum malaria patients in the area, using data from the malaria surveillance programmed under the containment project. METHODS: The study was conducted in seven provinces of Thailand along the Thai-Cambodian border. Data of Plasmodium falciparum-positive patients during January 2009 to December 2011 were obtained from the electronic malaria information system (eMIS) Web-based reporting system. All P. falciparum cases were followed for 42 days, as the routine case follow-up protocol. The demographic characteristics of the patients were described. Statistical analysis was performed to determine the cure rate of the current standard anti-malarial drug regimen--mefloquine-artesunate combination therapy (MAS). The proportion of patients who remained parasite-positive at each follow-up day was calculated. In addition, factors related to the delayed parasite clearance on day-3 post-treatment, were explored. RESULTS: A total of 1,709 P. falciparum-positive cases were reported during the study period. Almost 70% of falciparum cases received MAS therapy (n = 1,174). The majority of cases were males, aged between 31 and 50 years. The overall MAS cure rate was > 90% over the three-year period. Almost all patients were able to clear the parasite within 7 to 14 days post-treatment. Approximately 14% of patients undergoing MAS remained parasite-positive on day-3. Delayed parasite clearance was not significantly associated with patient gender, age, or citizenship. However, delayed parasite clearance varied across the study area. CONCLUSION: Anti-malarial drug-resistant parasites should be closely monitored in the area along the Thai-Cambodian border. Although the MAS cure rate in this study area was above 90%, an increasing trend of treatment failure has been reported in neighboring parts. Effective malaria surveillance is an important component to monitor drug-resistance in the malaria containment project