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NOT Open Access | Molecular surveillance of malaria in the Central Highlands, Vietnam

August 4, 2021 - 16:06 -- NOT Open Access
Võ TC, Lê HG, Kang JM, Naw H, Fan CK, Trinh NTM, Quang HH, Na BK
Parasitol Int. 2021 Aug;83:102374

Vietnam achieved outstanding success against malaria in the last few decades. The mortality and morbidity of malaria in Vietnam have decreased remarkably in recent years, but malaria is still a major public health concern in the country, particularly in the Central Highlands region. In this study, molecular analyses of malaria parasites in the Central Highlands were performed to understand the population structure and genetic diversity of the parasites circulating in the region.

Mosquitoes (Diptera: Culicidae) from Villages and Forest Areas of Rural Communes in Khanh Hoa and Binh Phuoc Provinces, Vietnam

June 22, 2021 - 14:19 -- Open Access
Vu NS, Hertz JC, Martin NJ, Tran TC, Fiorenzano JM, Tran PV, Nguyen HV, Dang AD, Tran DN, Motoki MT
J Med Entomol. 2021 Jun 18:tjab106

This study presents the diversity of mosquitoes collected from communes, endemic with malaria and dengue, located in Khanh Hoa and Binh Phuoc Provinces, Vietnam. A total of 10,288 mosquitoes were collected in the village and forested sites using standard larval dippers, cow-baited traps, ultra-violet light traps, and mechanical aspirators. Mosquito taxa were identified morphologically and species complexes/groups were further characterized molecularly.

Predictors of treatment failures of plasmodium falciparum malaria in Vietnam: a 4-year single‐centre retrospective study

May 6, 2021 - 07:11 -- Open Access
Minh Cuong Duong, Oanh Kieu Nguyet Pham, Phong Thanh Nguyen, Van Vinh Chau Nguyen and Phu Hoan Nguyen
Malaria Journal 2021 20:205, 29 April 2021

Drug-resistant falciparum malaria is an increasing public health burden. This study examined the magnitude of Plasmodium falciparum infection and the patterns and predictors of treatment failure in Vietnam.

Ivermectin Treatment for Cattle Reduced the Survival of Two Malaria Vectors, Anopheles dirus and Anopheles epiroticus, Under Laboratory Conditions in Central Vietnam

April 28, 2021 - 13:51 -- Open Access
Cramer EY, Quang NX, Hertz JC, Van Nguyen D, Quang HH, Mendenhall I, Lover AA
Am J Trop Med Hyg. 2021 Apr 26:tpmd201239

Ivermectin is a low-cost and nontoxic mosquitocide that may have a role in malaria elimination. However, the extent to which this drug impacts the mortality of Anopheles dirus and Anopheles epiroticus, two important malaria vectors in Southeast Asia, is unknown. This study compared quantified anopheline mortality after feeding on ivermectin-treated cattle and control cattle in Vietnam.

Results from a malaria indicator survey highlight the importance of routine data capture in high-risk forest and farm transmission sites in Vietnam to tailor location-specific malaria elimination interventions

April 22, 2021 - 08:33 -- Open Access
Ngo TD, Canavati SE, Dung DV, Vo TH, Tran DT, Tran LK, Whedbee RJ, Milgotina EI, Kelly GC, Edgel KA, Martin NJ
PLoS One. 2021 Apr 16;16(4):e0250045

In-line with the World Health Organization's (WHO) Global Technical Strategy for Malaria (2016-2030), Vietnam is striving to eliminate malaria by 2030. Targeting appropriate interventions in high-risk populations such as forest and forest-fringe communities is a critical component of malaria elimination efforts in Vietnam. In 2016, a household-level malaria indicator survey was conducted in Phu Yen Province, Vietnam with the aim of assessing the knowledge, behaviors and associated risks of malaria infection among priority mobile and migrant populations (MMPs) working and sleeping in forests and on farms.

Mosquito Net Ownership, Utilization, and Preferences among Mobile and Migrant Populations Sleeping in Forests and Farms in Central Vietnam: A Cross-Sectional Study

April 6, 2021 - 14:12 -- Open Access
Canavati SE, Kelly GC, Vo TH, Tran LK, Ngo TD, Tran DT, Edgel KA, Martin NJ
Am J Trop Med Hyg. 2021 Apr 5:tpmd200711

Strengthening vector control measures among mobile and migrant populations (MMPs) is crucial to malaria elimination, particularly in areas with multidrug-resistant malaria. Although a global priority, providing access and ensuring high coverage of available tools such as long-lasting insecticidal nets (LLINs) among these vulnerable groups remains a significant challenge. We assessed mosquito net ownership, utilization, and preference among individuals who slept in a forest and/or on a farm against those residing only in village "home" settings in a priority malaria elimination area of Vietnam.

NOT Open Access | Multidrug-resistant Plasmodium falciparum parasites in the Central Highlands of Vietnam jeopardize malaria control and elimination strategies

February 2, 2021 - 16:52 -- NOT Open Access
Quang HH, Chavchich M, Trinh NTM, Edgel KA, Edstein MD, Martin NJ
Antimicrob Agents Chemother. 2021 Feb 1:AAC.01639-20

Plasmodium falciparum resistance to dihydroartemisinin-piperaquine has spread through the Greater Mekong Subregion to southwestern Vietnam.

Diagnostic Practices and Treatment for P. vivax in the InterEthnic Therapeutic Encounter of South-Central Vietnam: A Mixed-Methods Study

January 6, 2021 - 13:13 -- Open Access
Nguyen TT, Nguyen XX, Gryseels C, et al.
Pathogens. 2020 Dec 31;10(1):E26

Malaria elimination in the Greater Mekong Sub-Region is challenged by a rising proportion of malaria attributable to P. vivax. Primaquine (PQ) is effective in eliminating the parasite's dormant liver stages and can prevent relapsing infections, but it induces severe haemolysis in patients with Glucose-6-Phosphate Dehydrogenase (G6PD) deficiency, highlighting the importance of testing enzyme activity prior to treatment.

Molecular surveillance and temporal monitoring of malaria parasites in focal Vietnamese provinces

January 1, 2021 - 16:13 -- Open Access
Bui Van Long, Genevieve Allen, Melanie Brauny, Le Thi Kieu Linh, Srinivas Reddy Pallerla, Tran Thi Thu Huyen, Hoang Van Tong, Nguyen Linh Toan, Do Quyet, Ho Anh Son and Thirumalaisamy P. Velavan
Malaria Journal 2020 19:458, 31 December 2020

While the World Health Organization (WHO) Southeast Asia region has the second highest incidence of malaria worldwide, malaria in Vietnam is focal to few provinces, where delayed parasite clearance to anti-malarial drugs is documented. This study aims to understand Plasmodium species distribution and the genetic diversity of msp1 and msp2 of parasite populations using molecular tools.

Targeting high risk forest goers for malaria elimination: a novel approach for investigating forest malaria to inform program intervention in Vietnam

October 20, 2020 - 16:18 -- Open Access
Canavati SE, Kelly GC, Quintero CE, Vo TH, Tran LK, Ngo TD, Tran DT, Edgel KA, Martin NJ
BMC Infect Dis. 2020 Oct 15;20(1):757

Individuals that work and sleep in remote forest and farm locations in the Greater Mekong Subregion continue to remain at high risk of both acquiring and transmitting malaria. These difficult-to-access population groups largely fall outside the reach of traditional village-centered interventions, presenting operational challenges for malaria programs. In Vietnam, over 60% of malaria cases are thought to be individuals who sleep in forests or on farms. New malaria elimination strategies are needed in countries where mobile and migrant workers frequently sleep outside of their homes. The aim of this study was to apply targeted surveillance-response based investigative approaches to gather location-specific data on confirmed malaria cases, with an objective to identify associated malaria prevention, treatment and risk behaviors of individuals sleeping in remote forest and farms sites in Vietnam.


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