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2. Genetic surveillance in the Greater Mekong subregion and South Asia to support malaria control and elimination.

Author

Jacob, Christopher G, Thuy-Nhien, Nguyen, Mayxay, Mayfong, Maude, Richard J, Quang, Huynh Hong, Hongvanthong, Bouasy, Vanisaveth, Viengxay, Ngo Duc, Thang, Rekol, Huy, van der Pluijm, Rob, von Seidlein, Lorenz, Fairhurst, Rick, Nosten, François, Hossain, Md Amir, Park, Naomi, Goodwin, Scott, Ringwald, Pascal, Chindavongsa, Keobouphaphone, Newton, Paul, Ashley, Elizabeth, Phalivong, Sonexay, Maude, Rapeephan, Leang, Rithea, Huch, Cheah, Dong, Le Thanh, Nguyen, Kim-Tuyen, Nhat, Tran Minh, Hien, Tran Tinh, Nguyen, Hoa, Zdrojewski, Nicole, Canavati, Sara, Sayeed, Abdullah Abu, Uddin, Didar, Buckee, Caroline, Fanello, Caterina I, Onyamboko, Marie, Peto, Thomas, Tripura, Rupam, Amaratunga, Chanaki, Myint Thu, Aung, Delmas, Gilles, Landier, Jordi, Parker, Daniel M, Chau, Nguyen Hoang, Lek, Dysoley, Suon, Seila, Callery, James, Jittamala, Podjanee, Hanboonkunupakarn, Borimas, Pukrittayakamee, Sasithon, Phyo, Aung Pyae, Smithuis, Frank, Lin, Khin, Thant, Myo, Hlaing, Tin Maung, Satpathi, Parthasarathi, Satpathi, Sanghamitra, Behera, Prativa K, Tripura, Amar, Baidya, Subrata, Valecha, Neena, Anvikar, Anupkumar R, Ul Islam, Akhter, Faiz, Abul, Kunasol, Chanon, Drury, Eleanor, Kekre, Mihir, Ali, Mozam, Love, Katie, Rajatileka, Shavanthi, Jeffreys, Anna E, Rowlands, Kate, Hubbart, Christina S, Dhorda, Mehul, Vongpromek, Ranitha, Kotanan, Namfon, Wongnak, Phrutsamon, Almagro Garcia, Jacob, Pearson, Richard D, Ariani, Cristina V, Chookajorn, Thanat, Malangone, Cinzia, Nguyen, T, Stalker, Jim, Jeffery, Ben, Keatley, Jonathan, Johnson, Kimberly J, Muddyman, Dawn, Chan, Xin Hui S, Sillitoe, John, Amato, Roberto, Simpson, Victoria, Gonçalves, Sonia, Rockett, Kirk, Day, Nicholas P, Dondorp, Arjen M, Kwiatkowski, Dominic P, and Miotto, Olivo

Subjects
asia, drug resistance, epidemiology, genetic surveillance, global health, infectious disease, malaria, microbiology, Biochemistry and Cell Biology
Abstract

BackgroundNational Malaria Control Programmes (NMCPs) currently make limited use of parasite genetic data. We have developed GenRe-Mekong, a platform for genetic surveillance of malaria in the Greater Mekong Subregion (GMS) that enables NMCPs to implement large-scale surveillance projects by integrating simple sample collection procedures in routine public health procedures.MethodsSamples from symptomatic patients are processed by SpotMalaria, a high-throughput system that produces a comprehensive set of genotypes comprising several drug resistance markers, species markers and a genomic barcode. GenRe-Mekong delivers Genetic Report Cards, a compendium of genotypes and phenotype predictions used to map prevalence of resistance to multiple drugs.ResultsGenRe-Mekong has worked with NMCPs and research projects in eight countries, processing 9623 samples from clinical cases. Monitoring resistance markers has been valuable for tracking the rapid spread of parasites resistant to the dihydroartemisinin-piperaquine combination therapy. In Vietnam and Laos, GenRe-Mekong data have provided novel knowledge about the spread of these resistant strains into previously unaffected provinces, informing decision-making by NMCPs.ConclusionsGenRe-Mekong provides detailed knowledge about drug resistance at a local level, and facilitates data sharing at a regional level, enabling cross-border resistance monitoring and providing the public health community with valuable insights. The project provides a rich open data resource to benefit the entire malaria community.FundingThe GenRe-Mekong project is funded by the Bill and Melinda Gates Foundation (OPP11188166, OPP1204268). Genotyping and sequencing were funded by the Wellcome Trust (098051, 206194, 203141, 090770, 204911, 106698/B/14/Z) and Medical Research Council (G0600718). A proportion of samples were collected with the support of the UK Department for International Development (201900, M006212), and Intramural Research Program of the National Institute of Allergy and Infectious Diseases.

Published
2021

4. Genetic surveillance ofPlasmodium falciparumreveals rapid population changes following first-line treatment policy revisions in the Greater Mekong Subregion

Author

Verschuuren, Tess D, primary, Wasakul, Varanya, additional, Thuy-Nhien, Nguyen, additional, Booth, Ethan, additional, Quang, Huynh Hong, additional, Thang, Ngo Duc, additional, Chindavongsa, Keobouphaphone, additional, Sovannaroth, Siv, additional, Banouvong, Virasak, additional, Sengsavath, Viengphone, additional, Mayxay, Mayfong, additional, Tuyen, Nguyen Thi Kim, additional, Phuong, Vo Ngoc Lam, additional, Trung, Pham Duc, additional, Goncalves, Sonia, additional, Chen, Soun, additional, Phalivong, Sonexay, additional, Xayvanghang, Saiamphone, additional, Mahaphontrakoon, Supaporn, additional, Pearson, Richard D, additional, Newton, Paul N, additional, Maude, Richard J, additional, Ashley, Elizabeth A, additional, Ariani, Cristina, additional, Simpson, Victoria J, additional, Day, Nicholas P, additional, Dondorp, Arjen M, additional, and Miotto, Olivo, additional

Published
2024
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5. The impact of targeted malaria elimination with mass drug administrations on falciparum malaria in Southeast Asia: A cluster randomised trial.

Author

von Seidlein, Lorenz, Peto, Thomas J, Landier, Jordi, Nguyen, Thuy-Nhien, Tripura, Rupam, Phommasone, Koukeo, Pongvongsa, Tiengkham, Lwin, Khin Maung, Keereecharoen, Lilly, Kajeechiwa, Ladda, Thwin, May Myo, Parker, Daniel M, Wiladphaingern, Jacher, Nosten, Suphak, Proux, Stephane, Corbel, Vincent, Tuong-Vy, Nguyen, Phuc-Nhi, Truong Le, Son, Do Hung, Huong-Thu, Pham Nguyen, Tuyen, Nguyen Thi Kim, Tien, Nguyen Thanh, Dong, Le Thanh, Hue, Dao Van, Quang, Huynh Hong, Nguon, Chea, Davoeung, Chan, Rekol, Huy, Adhikari, Bipin, Henriques, Gisela, Phongmany, Panom, Suangkanarat, Preyanan, Jeeyapant, Atthanee, Vihokhern, Benchawan, van der Pluijm, Rob W, Lubell, Yoel, White, Lisa J, Aguas, Ricardo, Promnarate, Cholrawee, Sirithiranont, Pasathorn, Malleret, Benoit, Rénia, Laurent, Onsjö, Carl, Chan, Xin Hui, Chalk, Jeremy, Miotto, Olivo, Patumrat, Krittaya, Chotivanich, Kesinee, Hanboonkunupakarn, Borimas, Jittmala, Podjanee, Kaehler, Nils, Cheah, Phaik Yeong, Pell, Christopher, Dhorda, Mehul, Imwong, Mallika, Snounou, Georges, Mukaka, Mavuto, Peerawaranun, Pimnara, Lee, Sue J, Simpson, Julie A, Pukrittayakamee, Sasithon, Singhasivanon, Pratap, Grobusch, Martin P, Cobelens, Frank, Smithuis, Frank, Newton, Paul N, Thwaites, Guy E, Day, Nicholas PJ, Mayxay, Mayfong, Hien, Tran Tinh, Nosten, Francois H, Dondorp, Arjen M, and White, Nicholas J

Subjects
Humans, Malaria, Falciparum, Antimalarials, Cluster Analysis, Cross-Over Studies, Drug Resistance, Multiple, Adolescent, Adult, Child, Asia, Southeastern, Female, Male, Young Adult, Disease Eradication, Mass Drug Administration, Malaria, Falciparum, Drug Resistance, Multiple, Asia, Southeastern, General & Internal Medicine, Medical and Health Sciences
Abstract

BackgroundThe emergence and spread of multidrug-resistant Plasmodium falciparum in the Greater Mekong Subregion (GMS) threatens global malaria elimination efforts. Mass drug administration (MDA), the presumptive antimalarial treatment of an entire population to clear the subclinical parasite reservoir, is a strategy to accelerate malaria elimination. We report a cluster randomised trial to assess the effectiveness of dihydroartemisinin-piperaquine (DP) MDA in reducing falciparum malaria incidence and prevalence in 16 remote village populations in Myanmar, Vietnam, Cambodia, and the Lao People's Democratic Republic, where artemisinin resistance is prevalent.Methods and findingsAfter establishing vector control and community-based case management and following intensive community engagement, we used restricted randomisation within village pairs to select 8 villages to receive early DP MDA and 8 villages as controls for 12 months, after which the control villages received deferred DP MDA. The MDA comprised 3 monthly rounds of 3 daily doses of DP and, except in Cambodia, a single low dose of primaquine. We conducted exhaustive cross-sectional surveys of the entire population of each village at quarterly intervals using ultrasensitive quantitative PCR to detect Plasmodium infections. The study was conducted between May 2013 and July 2017. The investigators randomised 16 villages that had a total of 8,445 residents at the start of the study. Of these 8,445 residents, 4,135 (49%) residents living in 8 villages, plus an additional 288 newcomers to the villages, were randomised to receive early MDA; 3,790 out of the 4,423 (86%) participated in at least 1 MDA round, and 2,520 out of the 4,423 (57%) participated in all 3 rounds. The primary outcome, P. falciparum prevalence by month 3 (M3), fell by 92% (from 5.1% [171/3,340] to 0.4% [12/2,828]) in early MDA villages and by 29% (from 7.2% [246/3,405] to 5.1% [155/3,057]) in control villages. Over the following 9 months, the P. falciparum prevalence increased to 3.3% (96/2,881) in early MDA villages and to 6.1% (128/2,101) in control villages (adjusted incidence rate ratio 0.41 [95% CI 0.20 to 0.84]; p = 0.015). Individual protection was proportional to the number of completed MDA rounds. Of 221 participants with subclinical P. falciparum infections who participated in MDA and could be followed up, 207 (94%) cleared their infections, including 9 of 10 with artemisinin- and piperaquine-resistant infections. The DP MDAs were well tolerated; 6 severe adverse events were detected during the follow-up period, but none was attributable to the intervention.ConclusionsAdded to community-based basic malaria control measures, 3 monthly rounds of DP MDA reduced the incidence and prevalence of falciparum malaria over a 1-year period in areas affected by artemisinin resistance. P. falciparum infections returned during the follow-up period as the remaining infections spread and malaria was reintroduced from surrounding areas. Limitations of this study include a relatively small sample of villages, heterogeneity between villages, and mobility of villagers that may have limited the impact of the intervention. These results suggest that, if used as part of a comprehensive, well-organised, and well-resourced elimination programme, DP MDA can be a useful additional tool to accelerate malaria elimination.Trial registrationClinicalTrials.gov NCT01872702.

Published
2019

7. Measuring effects of ivermectin-treated cattle on potential malaria vectors in Vietnam: A cluster-randomized trial.

Author

Cramer, Estee Y., Nguyen, Xuan Quang, Hertz, Jeffrey C., Nguyen, Do Van, Quang, Huynh Hong, Mendenhall, Ian H., and Lover, Andrew A.

Subjects
AEDES aegypti, CATTLE, NEGATIVE binomial distribution, MALARIA, GENERALIZED estimating equations, BOVINE viral diarrhea, FIELD research
Abstract

Background: Malaria elimination using current tools has stalled in many areas. Ivermectin (IVM) is a broad-antiparasitic drug and mosquitocide and has been proposed as a tool for accelerating progress towards malaria elimination. Under laboratory conditions, IVM has been shown to reduce the survival of adult Anopheles populations that have fed on IVM-treated mammals. Treating cattle with IVM has been proposed as an important contribution to malaria vector management, however, the impacts of IVM in this One Health use case have been untested in field trials in Southeast Asia. Methods: Through a randomized village-based trial, this study quantified the effect of IVM-treated cattle on anopheline populations in treated vs. untreated villages in Central Vietnam. Local zebu cattle in six rural villages were included in this study. In three villages, cattle were treated with IVM at established veterinary dosages, and in three additional villages cattle were left as untreated controls. For the main study outcome, the mosquito populations in all villages were sampled using cattle-baited traps for six nights before, and six nights after a 2-day treatment IVM-administration (intervention) period. Anopheline species were characterized using taxonomic keys. The impact of the intervention was analyzed using a difference-in-differences (DID) approach with generalized estimating equations (with negative binomial distribution and robust errors). This intervention was powered to detect a 50% reduction in total nightly Anopheles spp. vector catches from cattle-baited traps. Given the unusual diversity in anopheline populations, exploratory analyses examined taxon-level differences in the ecological population diversity. Results: Across the treated villages, 1,112 of 1,527 censused cows (73% overall; range 67% to 83%) were treated with IVM. In both control and treated villages, there was a 30% to 40% decrease in total anophelines captured in the post-intervention period as compared to the pre-intervention period. In the control villages, there were 1,873 captured pre-intervention and 1,079 captured during the post-intervention period. In the treated villages, there were 1,594 captured pre-intervention, and 1,101 captured during the post-intervention period. The difference in differences model analysis comparing total captures between arms was not statistically significant (p = 0.61). Secondary outcomes of vector population diversity found that in three villages (one control and two treatment) Brillouin's index increased, and in three villages (two control and one treatment) Brillouin's index decreased. When examining biodiversity by trapping-night, there were no clear trends in treated or untreated vector populations. Additionally, there were no clear trends when examining the components of biodiversity: richness and evenness. Conclusions: The ability of this study to quantify the impacts of IVM treatment was limited due to unexpectedly large spatiotemporal variability in trapping rates; an area-wide decrease in trapping counts across all six villages post-intervention; and potential spillover effects. However, this study provides important data to directly inform future studies in the GMS and beyond for IVM-based vector control. Author summary: Malaria incidence in Vietnam has substantially declined in the last decade, however, current prevention strategies may be insufficient to achieve national elimination goals. A proposed tool for use as a mosquitocide is zooprophylaxis-aided ivermectin-based elimination (i.e., treating cattle with ivermectin to kill feeding mosquitoes). Ivermectin (IVM) is an inexpensive helminthicide and is safe for use in mammals. In laboratory studies, mosquitoes feeding on IVM-treated cattle have increased mortality compared to controls. Presented here is a randomized village-based trial to determine whether IVM treatment can reduce the number of captured mosquitoes. Six villages in Central Vietnam were randomly assigned to either receive IVM treatment or remain a control. Mosquitoes in each village were captured for six trap nights, followed by treatment in three villages, followed by trapping for an additional six nights. A difference-in-differences model did not show any statistically significant differences in capture rates between the treated and control villages. Factors including the amount of circulating IVM in the cattle population, crossover of mosquito populations, and differential feeding habits may have affected captures. A total of 18 species were identified using dichotomous keys. In post hoc analyses, no clear trends were observed in the anopheline populations after IVM treatment, as measured by ecological diversity metrics. Future studies should include additional villages, greater control of cattle movements, and consider potential vector movements. [ABSTRACT FROM AUTHOR]

Published
2024
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8. Evolution and expansion of multidrug-resistant malaria in southeast Asia: a genomic epidemiology study

Author

Hamilton, William L, Amato, Roberto, van der Pluijm, Rob W, Jacob, Christopher G, Quang, Huynh Hong, Thuy-Nhien, Nguyen Thanh, Hien, Tran Tinh, Hongvanthong, Bouasy, Chindavongsa, Keobouphaphone, Mayxay, Mayfong, Huy, Rekol, Leang, Rithea, Huch, Cheah, Dysoley, Lek, Amaratunga, Chanaki, Suon, Seila, Fairhurst, Rick M, Tripura, Rupam, Peto, Thomas J, Sovann, Yok, Jittamala, Podjanee, Hanboonkunupakarn, Borimas, Pukrittayakamee, Sasithon, Chau, Nguyen Hoang, Imwong, Mallika, Dhorda, Mehul, Vongpromek, Ranitha, Chan, Xin Hui S, Maude, Richard J, Pearson, Richard D, Nguyen, T, Rockett, Kirk, Drury, Eleanor, Gonçalves, Sónia, White, Nicholas J, Day, Nicholas P, Kwiatkowski, Dominic P, Dondorp, Arjen M, and Miotto, Olivo

Published
2019
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9. Implementing parasite genotyping into national surveillance frameworks: feedback from control programmes and researchers in the Asia–Pacific region

Author

Noviyanti, Rintis, Miotto, Olivo, Barry, Alyssa, Marfurt, Jutta, Siegel, Sasha, Thuy-Nhien, Nguyen, Quang, Huynh Hong, Anggraeni, Nancy Dian, Laihad, Ferdinand, Liu, Yaobao, Sumiwi, Maria Endang, Trimarsanto, Hidayat, Coutrier, Farah, Fadila, Nadia, Ghanchi, Najia, Johora, Fatema Tuj, Puspitasari, Agatha Mia, Tavul, Livingstone, Trianty, Leily, Utami, Retno Ayu Setya, Wang, Duoquan, Wangchuck, Kesang, Price, Ric N., and Auburn, Sarah

Published
2020
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10. Molecular characterization and mapping of glucose-6-phosphate dehydrogenase (G6PD) mutations in the Greater Mekong Subregion

Author

Bancone, Germana, Menard, Didier, Khim, Nimol, Kim, Saorin, Canier, Lydie, Nguong, Chea, Phommasone, Koukeo, Mayxay, Mayfong, Dittrich, Sabine, Vongsouvath, Malavanh, Fievet, Nadine, Le Hesran, Jean-Yves, Briand, Valerie, Keomany, Sommay, Newton, Paul N., Gorsawun, Gornpan, Tardy, Kaelan, Chu, Cindy S., Rattanapalroj, Orpreeya, Dong, Le Thanh, Quang, Huynh Hong, Tam-Uyen, Nguyen, Thuy-Nhien, Nguyen, Hien, Tran Tinh, Kalnoky, Michael, and Nosten, Francois

Published
2019
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12. Pf7: an open dataset of Plasmodium falciparum genome variation in 20,000 worldwide samples

Author

Abdel Hamid, Muzamil Mahdi, Abdelraheem, Mohamed Hassan, Acheampong, Desmond Omane, Ahouidi, Ambroise, Ali, Mozam, Almagro-Garcia, Jacob, Amambua-Ngwa, Alfred, Amaratunga, Chanaki, Amenga-Etego, Lucas, Andagalu, Ben, Anderson, Tim, Andrianaranjaka, Voahangy, Aniebo, Ifeyinwa, Aninagyei, Enoch, Ansah, Felix, Ansah, Patrick, Apinjoh, Tobias, Arnaldo, Paulo, Ashley, Elizabeth, Auburn, Sarah, Awandare, Gordon, Ba, Hampate, Baraka, Vito, Barry, Alyssa, Bejon, Philip, Bertin, Gwladys, Boni, Maciej, Borrmann, Steffen, Bousema, Teun, Bouyou-Akotet, Marielle, Branch, Oralee, Bull, Peter, Cheah, Huch, Chindavongsa, Keobouphaphone, Chookajorn, Thanat, Chotivanich, Kesinee, Claessens, Antoine, Conway, David, Corredor, Vladimir, Courtier, Erin, Craig, Alister, d'Alessandro, Umberto, Dama, Souleymane, Day, Nicholas, Denis, Brigitte, Dhorda, Mehul, Diakite, Mahamadou, Djimde, Abdoulaye, Dolecek, Christiane, Dondorp, Arjen, Doumbia, Seydou, Drakeley, Chris, Drury, Eleanor, Duffy, Patrick, Echeverry, Diego, Egwang, Thomas, Enosse, Sonia Maria Mauricio, Erko, Berhanu, Fairhurst, Rick, Faiz, Abdul, Fanello, Caterina, Fleharty, Mark, Forbes, Matthew, Fukuda, Mark, Gamboa, Dionicia, Ghansah, Anita, Golassa, Lemu, Goncalves, Sonia, Harrison, G, Healy, Sara Anne, Hendry, Jason, Hernandez-Koutoucheva, Anastasia, Hien, Tran Tinh, Hill, Catherine, Hombhanje, Francis, Hott, Amanda, Htut, Ye, Hussein, Mazza, Imwong, Mallika, Ishengoma, Deus, Jackson, Scott, Jacob, Chris, Jeans, Julia, Johnson, Kimberly, Kamaliddin, Claire, Kamau, Edwin, Keatley, Jon, Kochakarn, Theerarat, Konate, Drissa, Konaté, Abibatou, Kone, Aminatou, Kwiatkowski, Dominic, Kyaw, Myat, Kyle, Dennis, Lawniczak, Mara, Lee, Samuel, Lemnge, Martha, Lim, Pharath, Lon, Chanthap, Loua, Kovana, Mandara, Celine, Marfurt, Jutta, Marsh, Kevin, Maude, Richard James, Mayxay, Mayfong, Maïga-Ascofaré, Oumou, Miotto, Olivo, Mita, Toshihiro, Mobegi, Victor, Mohamed, Abdelrahim Osman, Mokuolu, Olugbenga, Montgomery, Jaqui, Morang'A, Collins Misita, Mueller, Ivo, Murie, Kathryn, Newton, Paul, Ngo Duc, Thang, Nguyen, Thuy, Nguyen, Thuy-Nhien, Nguyen Thi Kim, Tuyen, Nguyen Van, Hong, Noedl, Harald, Nosten, François, Noviyanti, Rintis, Ntui, Vincent Ntui-Njock, Nzila, Alexis, Ochola-Oyier, Lynette Isabella, Ocholla, Harold, Oduro, Abraham, Omedo, Irene, Onyamboko, Marie, Ouedraogo, Jean-Bosco, Oyebola, Kolapo, Oyibo, Wellington Aghoghovwia, Pearson, Richard, Peshu, Norbert, Phyo, Aung, Plowe, Christopher, Price, Ric, Pukrittayakamee, Sasithon, Quang, Huynh Hong, Randrianarivelojosia, Milijaona, Rayner, Julian, Ringwald, Pascal, Rosanas-Urgell, Anna, Rovira-Vallbona, Eduard, Ruano-Rubio, Valentin, Ruiz, Lastenia, Saunders, David, Shayo, Alex, Siba, Peter, Simpson, Victoria, Sissoko, Mahamadou, Smith, Christen, Su, Xin-Zhuan, Sutherland, Colin, Takala-Harrison, Shannon, Talman, Arthur, Tavul, Livingstone, Thanh, Ngo Viet, Thathy, Vandana, Thu, Aung Myint, Toure, Mahamoudou, Tshefu, Antoinette, Verra, Federica, Vinetz, Joseph, Wellems, Thomas, Wendler, Jason, White, Nicholas, Whitton, Georgia, Yavo, William, van der Pluijm, Rob, MalariaGEN, University of Khartoum, University of Cape Coast [Ghana], Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), The Wellcome Trust Sanger Institute [Cambridge], London School of Hygiene and Tropical Medicine [Fajara, Gambia], London School of Hygiene and Tropical Medicine (LSHTM), National Institute of Allergy and Infectious Diseases [Bethesda] (NIAID-NIH), National Institutes of Health [Bethesda] (NIH), West African Centre for Cell Biology of Infectious Pathogens [Legon, Ghana] (WACCBIP), University of Ghana, Navrongo Health Research Centre [Navrongo, Ghana] (NHRC), Kenya Medical Research Institute (KEMRI), Texas Biomedical Research Institute [San Antonio, TX], Université d'Antananarivo, University of Buéa, Instituto Nacional de Saude [Maputo, Mozambique] (INS), Centre for Tropical Medicine and Global Health [Oxford, UK], Nuffield Department of Medicine [Oxford, UK] (Big Data Institute), University of Oxford-University of Oxford, Mahidol Oxford Tropical Medicine Research Unit (MORU), University of Oxford-Mahidol University [Bangkok]-Wellcome Trust, Menzies School of Health Research [Australia], Charles Darwin University [Australia], Nuffield Department of Clinical Medicine [Oxford], University of Oxford, Institut de Recherche pour le Développement (IRD), Laboratory of Pathogen and Host Immunity [Montpellier] (LPHI), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM), Maladies infectieuses et vecteurs : écologie, génétique, évolution et contrôle (MIVEGEC), and Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Université de Montpellier (UM)

Subjects
data resource, lnfectious Diseases and Global Health Radboud Institute for Health Sciences [Radboudumc 4], plasmodium falciparum, genomics, malaria, Medicine (miscellaneous), genomic epidemiology, General Biochemistry, Genetics and Molecular Biology, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

Contains fulltext : 291985.pdf (Publisher’s version ) (Open Access) We describe the MalariaGEN Pf7 data resource, the seventh release of Plasmodium falciparum genome variation data from the MalariaGEN network. It comprises over 20,000 samples from 82 partner studies in 33 countries, including several malaria endemic regions that were previously underrepresented. For the first time we include dried blood spot samples that were sequenced after selective whole genome amplification, necessitating new methods to genotype copy number variations. We identify a large number of newly emerging crt mutations in parts of Southeast Asia, and show examples of heterogeneities in patterns of drug resistance within Africa and within the Indian subcontinent. We describe the profile of variations in the C-terminal of the csp gene and relate this to the sequence used in the RTS,S and R21 malaria vaccines. Pf7 provides high-quality data on genotype calls for 6 million SNPs and short indels, analysis of large deletions that cause failure of rapid diagnostic tests, and systematic characterisation of six major drug resistance loci, all of which can be freely downloaded from the MalariaGEN website.

Published
2023

15. Strongyloide Species Determinants in Vietnamese Human Stool Samples by Molecular Methods

Author

Vinh, Le Duc, Thach, Nguyen Kim, Quang, Huynh Hong, Do, Binh N., Hanh, Tran Thi Duc, Toan, Nguyen Minh, Lang, Ngo Van, Tuyen, Nguyen Trung, and Huong, Nguyen Thu

Subjects
medicine_pharmacology_other
Abstract

Background: Strongyloidiasis, a neglected disease caused by intestinal nematodes of the genus Strongyloides, is endemic to tropical and subtropical areas such as Vietnam. The morphological diagnosis of larvae by Hara Mori culture technique and microscopicare are considered the standard diagnostic procedures in the endemic areas of Strongyloides spp. However, they could only identify the genus, not the species of Strongyloides. DNA-molecular techniques which are highly sensitive and more cost-effective have been increasingly utilized in detection of Strongyloides species. This study aims to determine prevalence and the species of Strongyloides among resident population in Duc Hoa district, Long An province, Southern Vietnam. Methods: A cross-sectional study was conducted using 1,190 stool samples collected in Duc Hoa district, Long An province, Vietnam, from July, 2017 to November 2018. The stool specimens were transported to the Laboratory of Medical Parasitology, Pham Ngoc Thach University of Medicine within two hours of collection at an appropriate temperature of 25 oC. All samples were stored at 2 - 8°C and processed within 48 hours for microscopic examination. Molecular detection was carried out at Laboratory of Molecular Biology, Pham Ngoc Thach University of Medicine, Hochiminh city, VietNam. Results: Of the 1,190 samples tested, Strongyloides spp. larvae were detected in 79 specimens (6.6%) by two classical parasitological methods, namely direct microscopy and the modified Harada-Mori filter paper culture. DNA was extracted from 70 of the 79 samples of Strongyloides spp. larvae, which was subsequently characterized by real-time PCR amplification of the 18S and 28S regions of the rDNA gene. The results showed that 97.1% of the DNA samples were S. stercoralis, 2.9% were co-infections with S. ratti and S. stercoralis, and 2.9% belonged to S. ratti. For all 14 isolates, nucleotide sequencing was compared with other human pathogenic species of Strongyloides whose sequences are available in GenBank. The identity of 12/14 sequences were confirmed as S. stercoralis with a high level of similarity (91.3% - 100%) and over 98% for S. ratti. Between the two co-infection samples, the higher similarity belonged to S. stercoralis. Conclusion: A molecular amplification of small subunit ribosome RNA followed by sequence analysis has been proved to be a suitable method for discrimination of Strongyloides spp. retrieved from stool samples.

Published
2023

16. Pf7: an open dataset of Plasmodium falciparum genome variation in 20,000 worldwide samples

Author

MalariaGEN, Abdel Hamid, Muzamil Mahdi, Abdelraheem, Mohamed Hassan, Acheampong, Desmond Omane, Ahouidi, Ambroise, Ali, Mozam, Almagro-Garcia, Jacob, Amambua-Ngwa, Alfred, Amaratunga, Chanaki, Amenga-Etego, Lucas, Andagalu, Ben, Anderson, Tim, Andrianaranjaka, Voahangy, Aniebo, Ifeyinwa, Aninagyei, Enoch, Ansah, Felix, Ansah, Patrick O, Apinjoh, Tobias, Arnaldo, Paulo, Ashley, Elizabeth, Auburn, Sarah, Awandare, Gordon A, Ba, Hampate, Baraka, Vito, Barry, Alyssa, Bejon, Philip, Bertin, Gwladys I, Boni, Maciej F, Borrmann, Steffen, Bousema, Teun, Bouyou-Akotet, Marielle, Branch, Oralee, Bull, Peter C, Cheah, Huch, Chindavongsa, Keobouphaphone, Chookajorn, Thanat, Chotivanich, Kesinee, Claessens, Antoine, Conway, David J, Corredor, Vladimir, Courtier, Erin, Craig, Alister, D'Alessandro, Umberto, Dama, Souleymane, Day, Nicholas, Denis, Brigitte, Dhorda, Mehul, Diakite, Mahamadou, Djimde, Abdoulaye, Dolecek, Christiane, Dondorp, Arjen, Doumbia, Seydou, Drakeley, Chris, Drury, Eleanor, Duffy, Patrick, Echeverry, Diego F, Egwang, Thomas G, Enosse, Sonia Maria Mauricio, Erko, Berhanu, Fairhurst, Rick M, Faiz, Abdul, Fanello, Caterina A, Fleharty, Mark, Forbes, Matthew, Fukuda, Mark, Gamboa, Dionicia, Ghansah, Anita, Golassa, Lemu, Goncalves, Sonia, Harrison, GL Abby, Healy, Sara Anne, Hendry, Jason A, Hernandez-Koutoucheva, Anastasia, Hien, Tran Tinh, Hill, Catherine A, Hombhanje, Francis, Hott, Amanda, Htut, Ye, Hussein, Mazza, Imwong, Mallika, Ishengoma, Deus, Jackson, Scott A, Jacob, Chris G, Jeans, Julia, Johnson, Kimberly J, Kamaliddin, Claire, Kamau, Edwin, Keatley, Jon, Kochakarn, Theerarat, Konate, Drissa S, Konaté, Abibatou, Kone, Aminatou, Kwiatkowski, Dominic P, Kyaw, Myat P, Kyle, Dennis, Lawniczak, Mara, Lee, Samuel K, Lemnge, Martha, Lim, Pharath, Lon, Chanthap, Loua, Kovana M, Mandara, Celine I, Marfurt, Jutta, Marsh, Kevin, Maude, Richard James, Mayxay, Mayfong, Maïga-Ascofaré, Oumou, Miotto, Olivo, Mita, Toshihiro, Mobegi, Victor, Mohamed, Abdelrahim Osman, Mokuolu, Olugbenga A, Montgomery, Jaqui, Morang'a, Collins Misita, Mueller, Ivo, Murie, Kathryn, Newton, Paul N, Ngo Duc, Thang, Nguyen, Thuy, Nguyen, Thuy-Nhien, Nguyen Thi Kim, Tuyen, Nguyen Van, Hong, Noedl, Harald, Nosten, Francois, Noviyanti, Rintis, Ntui, Vincent Ntui-Njock, Nzila, Alexis, Ochola-Oyier, Lynette Isabella, Ocholla, Harold, Oduro, Abraham, Omedo, Irene, Onyamboko, Marie A, Ouedraogo, Jean-Bosco, Oyebola, Kolapo, Oyibo, Wellington Aghoghovwia, Pearson, Richard, Peshu, Norbert, Phyo, Aung P, Plowe, Christopher V, Price, Ric N, Pukrittayakamee, Sasithon, Quang, Huynh Hong, Randrianarivelojosia, Milijaona, Rayner, Julian C, Ringwald, Pascal, Rosanas-Urgell, Anna, Rovira-Vallbona, Eduard, Ruano-Rubio, Valentin, Ruiz, Lastenia, Saunders, David, Shayo, Alex, Siba, Peter, Simpson, Victoria J, Sissoko, Mahamadou S, Smith, Christen, Su, Xin-Zhuan, Sutherland, Colin, Takala-Harrison, Shannon, Talman, Arthur, Tavul, Livingstone, Thanh, Ngo Viet, Thathy, Vandana, Thu, Aung Myint, Toure, Mahamoudou, Tshefu, Antoinette, Verra, Federica, Vinetz, Joseph, Wellems, Thomas E, Wendler, Jason, White, Nicholas J, Whitton, Georgia, Yavo, William, Van Der Pluijm, Rob W, Amenga-Etego, Lucas [0000-0003-4468-0506], Anderson, Tim [0000-0002-0191-0204], Ansah, Patrick O [0000-0002-3214-5621], Ashley, Elizabeth [0000-0002-7620-4822], Ba, Hampate [0000-0002-9299-5775], Baraka, Vito [0000-0001-9694-9293], Bejon, Philip [0000-0002-2135-7549], Bertin, Gwladys I [0000-0002-2218-9591], Boni, Maciej F [0000-0002-0830-9630], Bousema, Teun [0000-0003-2666-094X], Chookajorn, Thanat [0000-0003-2876-6203], Claessens, Antoine [0000-0002-4277-0914], Conway, David J [0000-0002-8711-3037], Craig, Alister [0000-0003-0914-6164], D'Alessandro, Umberto [0000-0001-6341-5009], Day, Nicholas [0000-0003-2309-1171], Diakite, Mahamadou [0000-0002-4268-8857], Djimde, Abdoulaye [0000-0003-0062-2283], Dondorp, Arjen [0000-0001-5190-2395], Drakeley, Chris [0000-0003-4863-075X], Echeverry, Diego F [0000-0003-0301-4478], Erko, Berhanu [0000-0003-1685-752X], Faiz, Abdul [0000-0002-3460-7535], Fanello, Caterina A [0000-0003-1932-9562], Gamboa, Dionicia [0000-0002-1420-7729], Golassa, Lemu [0000-0002-1216-8711], Healy, Sara Anne [0000-0003-3078-6094], Ishengoma, Deus [0000-0003-2040-3416], Jackson, Scott A [0000-0002-3172-1607], Kamaliddin, Claire [0000-0001-8198-6235], Kamau, Edwin [0000-0002-5761-7883], Konate, Drissa S [0000-0002-4177-9642], Kwiatkowski, Dominic P [0000-0002-5023-0176], Kyle, Dennis [0000-0002-0238-965X], Lawniczak, Mara [0000-0002-3006-2080], Loua, Kovana M [0000-0003-0571-0944], Marsh, Kevin [0000-0001-8377-5466], Mayxay, Mayfong [0000-0002-6056-4516], Miotto, Olivo [0000-0001-8060-6771], Mita, Toshihiro [0000-0001-8180-2344], Mobegi, Victor [0000-0002-1962-5583], Morang'a, Collins Misita [0000-0002-6988-150X], Nguyen, Thuy-Nhien [0000-0002-4101-5706], Nosten, Francois [0000-0002-7951-0745], Ntui, Vincent Ntui-Njock [0000-0002-7532-9930], Oduro, Abraham [0000-0002-4191-7419], Onyamboko, Marie A [0000-0002-7501-5931], Ouedraogo, Jean-Bosco [0000-0003-0412-8733], Oyebola, Kolapo [0000-0002-1003-2570], Pearson, Richard [0000-0002-7386-3566], Phyo, Aung P [0000-0002-0383-9624], Price, Ric N [0000-0003-2000-2874], Rayner, Julian C [0000-0002-9835-1014], Rosanas-Urgell, Anna [0000-0002-0432-5203], Shayo, Alex [0000-0002-7099-8537], Su, Xin-Zhuan [0000-0003-3246-3248], Vinetz, Joseph [0000-0001-8344-2004], Wellems, Thomas E [0000-0003-3899-8454], and Apollo - University of Cambridge Repository

Subjects
data resource, plasmodium falciparum, genomics, malaria, genomic epidemiology
Abstract

We describe the MalariaGEN Pf7 data resource, the seventh release of Plasmodium falciparum genome variation data from the MalariaGEN network. It comprises over 20,000 samples from 82 partner studies in 33 countries, including several malaria endemic regions that were previously underrepresented. For the first time we include dried blood spot samples that were sequenced after selective whole genome amplification, necessitating new methods to genotype copy number variations. We identify a large number of newly emerging crt mutations in parts of Southeast Asia, and show examples of heterogeneities in patterns of drug resistance within Africa and within the Indian subcontinent. We describe the profile of variations in the C-terminal of the csp gene and relate this to the sequence used in the RTS,S and R21 malaria vaccines. Pf7 provides high-quality data on genotype calls for 6 million SNPs and short indels, analysis of large deletions that cause failure of rapid diagnostic tests, and systematic characterisation of six major drug resistance loci, all of which can be freely downloaded from the MalariaGEN website.

Published
2023

20. Pyronaridine-Artesunate (Pyramax) for Treatment of Artemisinin- and Piperaquine-Resistant Plasmodium falciparum in the Central Highlands of Vietnam

Author

Manh, Nguyen Duc, primary, Thanh, Nguyen Van, additional, Quang, Huynh Hong, additional, Van, Nguyen Thi Thanh, additional, San, Nguyen Ngoc, additional, Phong, Nguyen Chinh, additional, Birrell, Geoffrey W., additional, Edstein, Michael D., additional, Edgel, Kimberly A., additional, Martin, Nicholas J., additional, and Chavchich, Marina, additional

Published
2021
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23. Genetic surveillance in the Greater Mekong subregion and South Asia to support malaria control and elimination

Author

Jacob, Christopher G, primary, Thuy-Nhien, Nguyen, additional, Mayxay, Mayfong, additional, Maude, Richard J, additional, Quang, Huynh Hong, additional, Hongvanthong, Bouasy, additional, Vanisaveth, Viengxay, additional, Ngo Duc, Thang, additional, Rekol, Huy, additional, van der Pluijm, Rob, additional, von Seidlein, Lorenz, additional, Fairhurst, Rick, additional, Nosten, François, additional, Hossain, Md Amir, additional, Park, Naomi, additional, Goodwin, Scott, additional, Ringwald, Pascal, additional, Chindavongsa, Keobouphaphone, additional, Newton, Paul, additional, Ashley, Elizabeth, additional, Phalivong, Sonexay, additional, Maude, Rapeephan, additional, Leang, Rithea, additional, Huch, Cheah, additional, Dong, Le Thanh, additional, Nguyen, Kim-Tuyen, additional, Nhat, Tran Minh, additional, Hien, Tran Tinh, additional, Nguyen, Hoa, additional, Zdrojewski, Nicole, additional, Canavati, Sara, additional, Sayeed, Abdullah Abu, additional, Uddin, Didar, additional, Buckee, Caroline, additional, Fanello, Caterina I, additional, Onyamboko, Marie, additional, Peto, Thomas, additional, Tripura, Rupam, additional, Amaratunga, Chanaki, additional, Myint Thu, Aung, additional, Delmas, Gilles, additional, Landier, Jordi, additional, Parker, Daniel M, additional, Chau, Nguyen Hoang, additional, Lek, Dysoley, additional, Suon, Seila, additional, Callery, James, additional, Jittamala, Podjanee, additional, Hanboonkunupakarn, Borimas, additional, Pukrittayakamee, Sasithon, additional, Phyo, Aung Pyae, additional, Smithuis, Frank, additional, Lin, Khin, additional, Thant, Myo, additional, Hlaing, Tin Maung, additional, Satpathi, Parthasarathi, additional, Satpathi, Sanghamitra, additional, Behera, Prativa K, additional, Tripura, Amar, additional, Baidya, Subrata, additional, Valecha, Neena, additional, Anvikar, Anupkumar R, additional, Ul Islam, Akhter, additional, Faiz, Abul, additional, Kunasol, Chanon, additional, Drury, Eleanor, additional, Kekre, Mihir, additional, Ali, Mozam, additional, Love, Katie, additional, Rajatileka, Shavanthi, additional, Jeffreys, Anna E, additional, Rowlands, Kate, additional, Hubbart, Christina S, additional, Dhorda, Mehul, additional, Vongpromek, Ranitha, additional, Kotanan, Namfon, additional, Wongnak, Phrutsamon, additional, Almagro Garcia, Jacob, additional, Pearson, Richard D, additional, Ariani, Cristina V, additional, Chookajorn, Thanat, additional, Malangone, Cinzia, additional, Nguyen, T, additional, Stalker, Jim, additional, Jeffery, Ben, additional, Keatley, Jonathan, additional, Johnson, Kimberly J, additional, Muddyman, Dawn, additional, Chan, Xin Hui S, additional, Sillitoe, John, additional, Amato, Roberto, additional, Simpson, Victoria, additional, Gonçalves, Sonia, additional, Rockett, Kirk, additional, Day, Nicholas P, additional, Dondorp, Arjen M, additional, Kwiatkowski, Dominic P, additional, and Miotto, Olivo, additional

Published
2021
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24. Author response: Genetic surveillance in the Greater Mekong subregion and South Asia to support malaria control and elimination

Author

Jacob, Christopher G, primary, Thuy-Nhien, Nguyen, additional, Mayxay, Mayfong, additional, Maude, Richard J, additional, Quang, Huynh Hong, additional, Hongvanthong, Bouasy, additional, Vanisaveth, Viengxay, additional, Ngo Duc, Thang, additional, Rekol, Huy, additional, van der Pluijm, Rob, additional, von Seidlein, Lorenz, additional, Fairhurst, Rick, additional, Nosten, François, additional, Hossain, Md Amir, additional, Park, Naomi, additional, Goodwin, Scott, additional, Ringwald, Pascal, additional, Chindavongsa, Keobouphaphone, additional, Newton, Paul, additional, Ashley, Elizabeth, additional, Phalivong, Sonexay, additional, Maude, Rapeephan, additional, Leang, Rithea, additional, Huch, Cheah, additional, Dong, Le Thanh, additional, Nguyen, Kim-Tuyen, additional, Nhat, Tran Minh, additional, Hien, Tran Tinh, additional, Nguyen, Hoa, additional, Zdrojewski, Nicole, additional, Canavati, Sara, additional, Sayeed, Abdullah Abu, additional, Uddin, Didar, additional, Buckee, Caroline, additional, Fanello, Caterina I, additional, Onyamboko, Marie, additional, Peto, Thomas, additional, Tripura, Rupam, additional, Amaratunga, Chanaki, additional, Myint Thu, Aung, additional, Delmas, Gilles, additional, Landier, Jordi, additional, Parker, Daniel M, additional, Chau, Nguyen Hoang, additional, Lek, Dysoley, additional, Suon, Seila, additional, Callery, James, additional, Jittamala, Podjanee, additional, Hanboonkunupakarn, Borimas, additional, Pukrittayakamee, Sasithon, additional, Phyo, Aung Pyae, additional, Smithuis, Frank, additional, Lin, Khin, additional, Thant, Myo, additional, Hlaing, Tin Maung, additional, Satpathi, Parthasarathi, additional, Satpathi, Sanghamitra, additional, Behera, Prativa K, additional, Tripura, Amar, additional, Baidya, Subrata, additional, Valecha, Neena, additional, Anvikar, Anupkumar R, additional, Ul Islam, Akhter, additional, Faiz, Abul, additional, Kunasol, Chanon, additional, Drury, Eleanor, additional, Kekre, Mihir, additional, Ali, Mozam, additional, Love, Katie, additional, Rajatileka, Shavanthi, additional, Jeffreys, Anna E, additional, Rowlands, Kate, additional, Hubbart, Christina S, additional, Dhorda, Mehul, additional, Vongpromek, Ranitha, additional, Kotanan, Namfon, additional, Wongnak, Phrutsamon, additional, Almagro Garcia, Jacob, additional, Pearson, Richard D, additional, Ariani, Cristina V, additional, Chookajorn, Thanat, additional, Malangone, Cinzia, additional, Nguyen, T, additional, Stalker, Jim, additional, Jeffery, Ben, additional, Keatley, Jonathan, additional, Johnson, Kimberly J, additional, Muddyman, Dawn, additional, Chan, Xin Hui S, additional, Sillitoe, John, additional, Amato, Roberto, additional, Simpson, Victoria, additional, Gonçalves, Sonia, additional, Rockett, Kirk, additional, Day, Nicholas P, additional, Dondorp, Arjen M, additional, Kwiatkowski, Dominic P, additional, and Miotto, Olivo, additional

Published
2021
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28. Genetic surveillance in the Greater Mekong Subregion and South Asia to support malaria control and elimination

Author

Jacob, Christopher G, primary, Thuy-Nhien, Nguyen, additional, Mayxay, Mayfong, additional, Maude, Richard J, additional, Quang, Huynh Hong, additional, Hongvanthong, Bouasy, additional, Vanisaveth, Viengxay, additional, Duc, Thang Ngo, additional, Rekol, Huy, additional, van der Pluijm, Rob W, additional, Von Seidlein, Lorenz, additional, Fairhurst, Rick M, additional, Nosten, Francois H, additional, Hossain, Md Amir, additional, Park, Naomi, additional, Goodwin, Scott, additional, Ringwald, Pascal, additional, Chindavongsa, Keobouphaphone, additional, Newton, Paul N, additional, Ashley, Elizabeth A, additional, Phalivong, Sonexay, additional, Maude, Rapeephan R, additional, Leang, Rithea, additional, Huch, Cheah, additional, Dong, Le Thanh, additional, Nguyen, Kim-Tuyen, additional, Nhat, Tran Minh, additional, Hien, Tran Tinh, additional, Nguyen, Hoa, additional, Zdrojewski, Nicole, additional, Canavati, Sara E, additional, Sayeed, Abdullah Abu, additional, Uddin, Didar, additional, Buckee, Caroline, additional, Fanello, Caterina I, additional, Onyamboko, Marie, additional, Peto, Thomas, additional, Tripura, Rupam, additional, Amaratunga, Chanaki, additional, Thu, Aung Myint, additional, Delmas, Gilles, additional, Landier, Jordi, additional, Parker, Daniel M, additional, Chau, Nguyen Hoang, additional, Lek, Dysoley, additional, Suon, Seila, additional, Callery, James J, additional, Jittamala, Podjanee, additional, Hanboonkunupakarn, Borimas, additional, Pukrittayakamee, Sasithon, additional, Phyo, Aung Pyae, additional, Smithuis, Frank, additional, Lin, Khin, additional, Thant, Myo, additional, Hlaing, Tin Maung, additional, Satpathi, Parthasarathi, additional, Satpathi, Sanghamitra, additional, Behera, Prativa K, additional, Tripura, Amar, additional, Baidya, Subrata, additional, Valecha, Neena, additional, Anvikar, Anupkumar R, additional, Islam, Akhter ul, additional, Faiz, Abul, additional, Kunasol, Chanon, additional, Drury, Eleanor, additional, Kekre, Mihir, additional, Ali, Mozam, additional, Love, Katie, additional, Rajatileka, Shavanthi, additional, Jeffreys, Anna E, additional, Rowlands, Kate, additional, Hubbart, Christina S, additional, Dhorda, Mehul, additional, Vongpromek, Ranitha, additional, Kotanan, Namfon, additional, Wongnak, Phrutsamon, additional, Garcia, Jacob Almagro, additional, Pearson, Richard D, additional, Ariani, Cristina V, additional, Chookajorn, Thanat, additional, Malangone, Cinzia, additional, Nguyen, T, additional, Stalker, Jim, additional, Jeffery, Ben, additional, Keatley, Jonathan, additional, Johnson, Kimberly J, additional, Muddyman, Dawn, additional, Chan, Xin Hui S, additional, Sillitoe, John, additional, Amato, Roberto, additional, Simpson, Victoria, additional, Gonçalves, Sonia, additional, Rockett, Kirk, additional, Day, Nicholas P, additional, Dondorp, Arjen M, additional, Kwiatkowski, Dominic P, additional, and Miotto, Olivo, additional

Published
2020
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29. Evolution and expansion of multidrug resistant malaria in Southeast Asia: a genomic epidemiology study

Author

Hamilton, William L, primary, Amato, Roberto, additional, van der Pluijm, Rob W, additional, Jacob, Christopher G, additional, Quang, Huynh Hong, additional, Thuy-Nhien, Nguyen Thanh, additional, Hien, Tran Tinh, additional, Hongvanthong, Bouasy, additional, Chindavongsa, Keobouphaphone, additional, Mayxay, Mayfong, additional, Rekol, Huy, additional, Leang, Rithea, additional, Huch, Cheah, additional, Dysoley, Lek, additional, Amaratunga, Chanaki, additional, Suon, Seila, additional, Fairhurst, Rick M, additional, Tripura, Rupam, additional, Peto, Thomas J, additional, Sovann, Yok, additional, Jittamala, Podjanee, additional, Hanboonkunupakarn, Borimas, additional, Pukrittayakamee, Sasithon, additional, Chau, Nguyen Hoang, additional, Imwong, Mallika, additional, Dhorda, Mehul, additional, Vongpromek, Ranitha, additional, Chan, Xin Hui S, additional, Maude, Richard J, additional, Pearson, Richard D, additional, Nguyen, T, additional, Rockett, Kirk, additional, Drury, Eleanor, additional, Gonçalves, Sonia, additional, White, Nicholas J, additional, Day, Nicholas P, additional, Kwiatkowski, Dominic P, additional, Dondorp, Arjen M, additional, and Miotto, Olivo, additional

Published
2019
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32. K13 Propeller Mutations in Plasmodium falciparum Populations in Regions of Malaria Endemicity in Vietnam from 2009 to 2016

Author

Thuy-Nhien, Nguyen, primary, Tuyen, Nguyen Kim, additional, Tong, Nguyen Thanh, additional, Vy, Nguyen Tuong, additional, Thanh, Ngo Viet, additional, Van, Huynh Thuy, additional, Huong-Thu, Pham, additional, Quang, Huynh Hong, additional, Boni, Maciej F., additional, Dolecek, Christiane, additional, Farrar, Jeremy, additional, Thwaites, Guy E., additional, Miotto, Olivo, additional, White, Nicholas J., additional, and Hien, Tran Tinh, additional

Published
2017
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33. Rapid decline in the susceptibility of Plasmodium falciparum to dihydroartemisinin–piperaquine in the south of Vietnam

Author

Thanh, Ngo Viet, primary, Thuy-Nhien, Nguyen, additional, Tuyen, Nguyen Thi Kim, additional, Tong, Nguyen Thanh, additional, Nha-Ca, Nguyen Thuy, additional, Dong, Le Thanh, additional, Quang, Huynh Hong, additional, Farrar, Jeremy, additional, Thwaites, Guy, additional, White, Nicholas J., additional, Wolbers, Marcel, additional, and Hien, Tran Tinh, additional

Published
2017
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34. Community perceptions of targeted anti-malarial mass drug administrations in two provinces in Vietnam: a quantitative survey

Author

Nguyen, Thuy-Nhien, primary, Thu, Pham N. Huong, additional, Hung, Ngo Trong, additional, Son, Do Hung, additional, Tien, Nguyen Thanh, additional, Van Dung, Nguyen, additional, Quang, Huynh Hong, additional, Seidlein, Lorenz von, additional, Cheah, Phaik Yeong, additional, Dondorp, Arjen M., additional, Day, Nicholas P. J., additional, White, Nicholas J., additional, and Hien, Tran Tinh, additional

Published
2017
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36. The efficacy and tolerability of artemisinin-piperaquine (Artequick®) versus artesunate-amodiaquine (Coarsucam™) for the treatment of uncomplicated Plasmodium falciparum malaria in south-central Vietnam

Author

Thanh, Nguyen Xuan, primary, Trung, Trieu Nguyen, additional, Phong, Nguyen Chinh, additional, Quang, Huynh Hong, additional, Dai, Bui, additional, Shanks, G Dennis, additional, Chavchich, Marina, additional, and Edstein, Michael D, additional

Published
2012
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37. A study implementing real-time PCR to identify Strongyloidesspecies of third-stage larvae in human stool samples from Southern Vietnam

Author

Vinh, Le Duc, Thach, Nguyen Kim, Quang, Huynh Hong, Binh, Do Nhu, Hanh, Tran Thi Duc, Toàn, Nguyen Minh, Tuyen, Nguyen Trung, and Huong, Nguyen Thu

Abstract

•Strongyloides rattiis a common intestinal parasite of rats which are closed to human.•S. rattiis used as a laboratory model for Strongyloidesmolecular diagnostic.•S. rattihas the soil transmission life cycle.•It is remarkable evidence of the presence of zoonosis S. rattidisease in human.

Published
2023
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38. Treatment of falciparum malaria in Vietnamese children: the need for combination therapy and optimized dosage regimens

Author

Trung, Trieu Nguyen, primary, Davis, Timothy M. E., additional, Hewitt, Sean, additional, Thuan, Le Khanh, additional, Quang, Huynh Hong, additional, Van Anh, Cao, additional, Thuy, Pham Thi, additional, Thoa, Nguyen Tan, additional, Tuan, Vo Thanh, additional, Hang, Nguyen Thi Le, additional, and Giang, Luu Thi Hong, additional

Published
2001
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39. Multidrug-Resistant Plasmodium falciparumParasites in the Central Highlands of Vietnam Jeopardize Malaria Control and Elimination Strategies

Author

Quang, Huynh Hong, Chavchich, Marina, Trinh, Nguyen Thi Minh, Edgel, Kimberly A., Edstein, Michael D., and Martin, Nicholas J.

Abstract

Plasmodium falciparumresistance to dihydroartemisinin-piperaquine has spread through the Greater Mekong Subregion to southwestern Vietnam. In 2018 to 2019, we collected 127 P. falciparumisolates from Dak Nong (36), Dak Lak (55), Gia Lai (13), and Kon Tum (23) provinces in Vietnam’s Central Highlands and found parasites bearing the Pfkelch13C580Y mutation and multiple plasmepsin 2/3genes (mean prevalence, 17.9%; range, 4.3% to 27.8%), conferring resistance to dihydroartemisinin-piperaquine.

Published
2021
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40. K13 Propeller Mutations in Plasmodium falciparumPopulations in Regions of Malaria Endemicity in Vietnam from 2009 to 2016

Author

Thuy-Nhien, Nguyen, Tuyen, Nguyen Kim, Tong, Nguyen Thanh, Vy, Nguyen Tuong, Thanh, Ngo Viet, Van, Huynh Thuy, Huong-Thu, Pham, Quang, Huynh Hong, Boni, Maciej F., Dolecek, Christiane, Farrar, Jeremy, Thwaites, Guy E., Miotto, Olivo, White, Nicholas J., and Hien, Tran Tinh

Abstract

ABSTRACTThe spread of artemisinin-resistant Plasmodium falciparumcompromises the therapeutic efficacy of artemisinin combination therapies (ACTs) and is considered the greatest threat to current global initiatives to control and eliminate malaria. This is particularly relevant in Vietnam, where dihydroartemisinin-piperaquine (DP) is the recommended ACT for P. falciparuminfection. The propeller domain gene of K13, a molecular marker of artemisinin resistance, was successfully sequenced in 1,060 P. falciparumisolates collected at 3 malaria hot spots in Vietnam between 2009 and 2016. Eight K13 propeller mutations (Thr474Ile, Tyr493His, Arg539Thr, Ile543Thr, Pro553Leu, Val568Gly, Pro574Leu, and Cys580Tyr), including several that have been validated to be artemisinin resistance markers, were found. The prevalences of K13 mutations were 29% (222/767), 6% (11/188), and 43% (45/105) in the Binh Phuoc, Ninh Thuan, and Gia Lai Provinces of Vietnam, respectively. Cys580Tyr became the dominant genotype in recent years, with 79.1% (34/43) of isolates in Binh Phuoc Province and 63% (17/27) of isolates in Gia Lai Province carrying this mutation. K13 mutations were associated with reduced ring-stage susceptibility to dihydroartemisinin (DHA) in vitroand prolonged parasite clearance in vivo. An analysis of haplotypes flanking K13 suggested the presence of multiple strains with the Cys580Tyr mutation rather than a single strain expanding across the three sites.

Published
2017
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41. ECHINOCOCCUS ORTLEPPI-INDUCED LEFT VENTRICULAR APICAL HYDATID CYST: INSIGHTS FROM SURGICAL INTERVENTION AND MOLECULAR IDENTIFICATION.

Author

Thao, Le Nhat, Nguyen, Dang, Thuan, Phan, Pham, Chuong, Bui, Vinh Duc An, Hue, Van Tran Thi, Le, Duc Vinh, Kim, Thach Nguyen, Thang, Ho Duc, Vuong, Ngoc-Minh, Vu, Loc, Van, Thanh T. Nguyen, Quang, Huynh Hong, Qureshi, Yusuf, Ansari, Miyaz, Nguyen, Triet M., and Nguyen, Dinh

Subjects
*ECHINOCOCCOSIS, *ECHINOCOCCUS
Published
2024
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42. Therapeutic efficacy of pyronaridine-artesunate (Pyramax) in treating Plasmodium vivax malaria in the central highlands of Vietnam.

Author

Manh ND, Thanh NV, Quang HH, Van NTT, San NN, Phong NC, Birrell GW, Edgel KA, Martin NJ, Edstein MD, and Chavchich M

Subjects
Humans, Vietnam, Adult, Male, Adolescent, Child, Female, Middle Aged, Young Adult, Primaquine therapeutic use, Polymorphism, Single Nucleotide genetics, Child, Preschool, Protozoan Proteins genetics, Drug Resistance genetics, Membrane Transport Proteins, Malaria, Vivax drug therapy, Malaria, Vivax parasitology, Naphthyridines therapeutic use, Antimalarials therapeutic use, Artesunate therapeutic use, Plasmodium vivax drug effects, Plasmodium vivax genetics, Artemisinins therapeutic use
Abstract

The emergence and spread of chloroquine-resistant Plasmodium vivax have necessitated the assessment of alternative blood schizonticidal drugs. In Vietnam, chloroquine-resistant P. vivax malaria has been reported. In an open-label, single-arm trial, the safety, tolerability, and efficacy of pyronaridine-artesunate (Pyramax, PA) was evaluated in Dak Nong province, Vietnam. A 3-day course of PA was administered to adults and children (≥20 kg) infected with P. vivax . Patients also received primaquine (0.25 mg/kg daily for 14 days). PA was well tolerated with transient asymptomatic increases in liver transaminases. The per-protocol proportion of patients with day 42 PCR-unadjusted adequate clinical and parasitological response was 96.0% (95% CI, 84.9%-99.0%, n = 48/50). The median parasite clearance time was 12 h (range, 12-36 h), with a median fever clearance time of 24 h (range, 12-60 h). Single nucleotide polymorphisms (SNPs) as potential genetic markers of reduced drug susceptibility were analyzed in three putative drug resistance markers, Pvcrt-o , Pvmdr1 , and PvK12 . Insertion at position K10 of the Pvcrt-o gene was found in 74.6% (44/59) of isolates. Pvmdr1 SNPs at Y976F and F1076L were present in 61% (36/59) and 78% (46/59), respectively. Amplification of Pvmdr1 gene (two copies) was found in 5.1% (3/59) of parasite samples. Only 5.1% (3/59) of isolates had mutation 552I of the PvK12 gene. Overall, PA rapidly cleared P. vivax blood asexual stages and was highly efficacious in treating vivax malaria, with no evidence of artemisinin resistance found. PA provides an alternative to chloroquine treatment for vivax malaria in Vietnam., Clinical Trials: This study is registered with the Australian New Zealand Clinical Trials Registry as ACTRN12618001429246., Competing Interests: The authors declare no conflict of interest.

Published
2024
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43. Pf7: an open dataset of Plasmodium falciparum genome variation in 20,000 worldwide samples.

Author

Abdel Hamid MM, Abdelraheem MH, Acheampong DO, Ahouidi A, Ali M, Almagro-Garcia J, Amambua-Ngwa A, Amaratunga C, Amenga-Etego L, Andagalu B, Anderson T, Andrianaranjaka V, Aniebo I, Aninagyei E, Ansah F, Ansah PO, Apinjoh T, Arnaldo P, Ashley E, Auburn S, Awandare GA, Ba H, Baraka V, Barry A, Bejon P, Bertin GI, Boni MF, Borrmann S, Bousema T, Bouyou-Akotet M, Branch O, Bull PC, Cheah H, Chindavongsa K, Chookajorn T, Chotivanich K, Claessens A, Conway DJ, Corredor V, Courtier E, Craig A, D'Alessandro U, Dama S, Day N, Denis B, Dhorda M, Diakite M, Djimde A, Dolecek C, Dondorp A, Doumbia S, Drakeley C, Drury E, Duffy P, Echeverry DF, Egwang TG, Enosse SMM, Erko B, Fairhurst RM, Faiz A, Fanello CA, Fleharty M, Forbes M, Fukuda M, Gamboa D, Ghansah A, Golassa L, Goncalves S, Harrison GLA, Healy SA, Hendry JA, Hernandez-Koutoucheva A, Hien TT, Hill CA, Hombhanje F, Hott A, Htut Y, Hussein M, Imwong M, Ishengoma D, Jackson SA, Jacob CG, Jeans J, Johnson KJ, Kamaliddin C, Kamau E, Keatley J, Kochakarn T, Konate DS, Konaté A, Kone A, Kwiatkowski DP, Kyaw MP, Kyle D, Lawniczak M, Lee SK, Lemnge M, Lim P, Lon C, Loua KM, Mandara CI, Marfurt J, Marsh K, Maude RJ, Mayxay M, Maïga-Ascofaré O, Miotto O, Mita T, Mobegi V, Mohamed AO, Mokuolu OA, Montgomery J, Morang'a CM, Mueller I, Murie K, Newton PN, Ngo Duc T, Nguyen T, Nguyen TN, Nguyen Thi Kim T, Nguyen Van H, Noedl H, Nosten F, Noviyanti R, Ntui VN, Nzila A, Ochola-Oyier LI, Ocholla H, Oduro A, Omedo I, Onyamboko MA, Ouedraogo JB, Oyebola K, Oyibo WA, Pearson R, Peshu N, Phyo AP, Plowe CV, Price RN, Pukrittayakamee S, Quang HH, Randrianarivelojosia M, Rayner JC, Ringwald P, Rosanas-Urgell A, Rovira-Vallbona E, Ruano-Rubio V, Ruiz L, Saunders D, Shayo A, Siba P, Simpson VJ, Sissoko MS, Smith C, Su XZ, Sutherland C, Takala-Harrison S, Talman A, Tavul L, Thanh NV, Thathy V, Thu AM, Toure M, Tshefu A, Verra F, Vinetz J, Wellems TE, Wendler J, White NJ, Whitton G, Yavo W, and van der Pluijm RW

Abstract

We describe the MalariaGEN Pf7 data resource, the seventh release of Plasmodium falciparum genome variation data from the MalariaGEN network.  It comprises over 20,000 samples from 82 partner studies in 33 countries, including several malaria endemic regions that were previously underrepresented.  For the first time we include dried blood spot samples that were sequenced after selective whole genome amplification, necessitating new methods to genotype copy number variations.  We identify a large number of newly emerging crt mutations in parts of Southeast Asia, and show examples of heterogeneities in patterns of drug resistance within Africa and within the Indian subcontinent.  We describe the profile of variations in the C-terminal of the csp gene and relate this to the sequence used in the RTS,S and R21 malaria vaccines.  Pf7 provides high-quality data on genotype calls for 6 million SNPs and short indels, analysis of large deletions that cause failure of rapid diagnostic tests, and systematic characterisation of six major drug resistance loci, all of which can be freely downloaded from the MalariaGEN website., Competing Interests: No competing interests were disclosed., (Copyright: © 2023 MalariaGEN et al.)

Published
2023
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44. Clinical and Laboratory Findings among Patients with Toxocariasis in Medic Medical Center, Ho Chi Minh City, Vietnam in 2017-2019.

Author

Phuc LDV, Loi CB, Quang HH, Vinh LD, Sinh CT, Van Du V, Tram QA, Quang KM, Hai TX, and Le TA

Abstract

Background: Human toxocariasis is prevalent in many countries but this disease has been rarely reported from Vietnam. We aimed to investigate the clinical and laboratory findings and assess possible association between these findings in patients with toxocariasis in Vietnam., Methods: A prospectively study, between October 2017 and June 2019 was performed involving 120 toxocariasis patients at Medic Medical Center, Ho Chi Minh City, Vietnam. The diagnosis of toxocariasis was established based on clinical, laboratory (eosinophilia, raised IgE concentration) and serological (positive Toxocara IgG ELISA test) evaluation as well as the exclusion of other helminthic coinfection., Results: The most frequently reported manifestation was of skin (n = 93, 77.5%), including urticarial (n= 69, 57.5%) followed by neurologic, gastrointestinal and pulmonary signs/symptoms. Hepatic involvement occurred in 8.3% of the patients. No significant relationship between clinical findings and laboratory parameters was found except the higher values of eosinophil count and IgE concentration among patients with liver involvement. There was a significant relationship between eosinophil count and IgE concentration (r=0.389, P <0.001). Serological findings did not show a correlation with clinical and other laboratory findings., Conclusion: Our data revealed a wide range of clinical symptoms/signs and a high incidence of skin manifestations in patients with toxocariasis. Eosinophil count and IgE concentration are valuable markers for the evaluation of the disease., Competing Interests: Conflict of interest The authors declare that they have no conflict interests., (Copyright © 2021 Vinh Phuc et al. Published by Tehran University of Medical Sciences.)

Published
2021
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