Social and Environmental Determinants of Malaria in Space and Time in Viet Nam

Overview

Journal Int J Parasitol

Specialty Parasitology

Date 2010 Sep 14

PMID 20833173

Citations 37

Authors

H Manh Bui

Archie C A Clements

Q Thieu Nguyen

M Hung Nguyen

X Hung Le

Simon I Hay

T Hien Tran

Heiman F L Wertheim

Robert W Snow

Peter Horby

Affiliations

Soon will be listed here.

Abstract

The malaria burden in Viet Nam has been in decline in recent decades, but localised areas of high transmission remain. We used spatiotemporal analytical tools to determine the social and environmental drivers of malaria risk and to identify residual high-risk areas where control and surveillance resources can be targeted. Counts of reported Plasmodium falciparum and Plasmodium vivax malaria cases by month (January 2007-December 2008) and by district were assembled. Zero-inflated Poisson regression models were developed in a bayesian framework. Models had the percentage of the district's population living below the poverty line, percent of the district covered by forest, median elevation, median long-term average precipitation, and minimum temperature included as fixed effects, and terms for temporal trend and residual district-level spatial autocorrelation. Strong temporal and spatial heterogeneity in counts of malaria cases was apparent. Poverty and forest cover were significantly associated with an increased count of malaria cases but the magnitude and direction of associations between climate and malaria varied by socio-ecological zone. There was a declining trend in counts of malaria cases during the study period. After accounting for the social and environmental fixed effects, substantial spatial heterogeneity was still evident. Unmeasured factors which may contribute to this residual variation include malaria control activities, population migration and accessibility to health care. Forest-related activities and factors encompassed by poverty indicators are major drivers of malaria incidence in Viet Nam.

Citing Articles

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References

Abe T, Honda S, Nakazawa S, Dinh Tuong T, Thieu N, Hung L . Risk factors for malaria infection among ethnic minorities in Binh Phuoc, Vietnam. Southeast Asian J Trop Med Public Health. 2009; 40(1):18-29. View

Noor A, Clements A, Gething P, Moloney G, Borle M, Shewchuk T . Spatial prediction of Plasmodium falciparum prevalence in Somalia. Malar J. 2008; 7:159. PMC: 2531188. DOI: 10.1186/1475-2875-7-159. View

Erhart A, Ngo D, Phan V, Ta T, Van Overmeir C, Speybroeck N . Epidemiology of forest malaria in central Vietnam: a large scale cross-sectional survey. Malar J. 2005; 4:58. PMC: 1325238. DOI: 10.1186/1475-2875-4-58. View

Morrow M, Nguyen Q, Caruana S, Biggs B, Doan N, Nong T . Pathways to malaria persistence in remote central Vietnam: a mixed-method study of health care and the community. BMC Public Health. 2009; 9:85. PMC: 2666724. DOI: 10.1186/1471-2458-9-85. View

Childs D, Cattadori I, Suwonkerd W, Prajakwong S, Boots M . Spatiotemporal patterns of malaria incidence in northern Thailand. Trans R Soc Trop Med Hyg. 2006; 100(7):623-31. DOI: 10.1016/j.trstmh.2005.09.011. View

Duc Thang N, Erhart A, Hung L, Thuan L, Xa N, Thanh N . Rapid decrease of malaria morbidity following the introduction of community-based monitoring in a rural area of central Vietnam. Malar J. 2009; 8:3. PMC: 2657912. DOI: 10.1186/1475-2875-8-3. View

Sanh N, Van Dung N, Thanh N, Trung T, Van Co T, Cooper R . Forest malaria in central Vietnam. Am J Trop Med Hyg. 2008; 79(5):652-4. View

Hung L, de Vries P, Giao P, Nam N, Binh T, Chong M . Control of malaria: a successful experience from Viet Nam. Bull World Health Organ. 2002; 80(8):660-6. PMC: 2567582. View

Delacollette C, Dsouza C, Christophel E, Thimasarn K, Abdur R, Bell D . Malaria trends and challenges in the Greater Mekong Subregion. Southeast Asian J Trop Med Public Health. 2009; 40(4):674-91. View

10.

Erhart A, Thang N, Hung N, Toi L, Hung L, Tuy T . Forest malaria in Vietnam: a challenge for control. Am J Trop Med Hyg. 2004; 70(2):110-8. View

11.

Wiwanitkit V . High prevalence of malaria in Myanmar migrant workers in a rural district near the Thailand-Myanmar border. Scand J Infect Dis. 2002; 34(3):236-7. DOI: 10.1080/00365540110077272. View

12.

Dondorp A, Yeung S, White L, Nguon C, Day N, Socheat D . Artemisinin resistance: current status and scenarios for containment. Nat Rev Microbiol. 2010; 8(4):272-80. DOI: 10.1038/nrmicro2331. View

13.

Kitvatanachai S, Janyapoon K, Rhongbutsri P, Chan Thap L . A survey on malaria in mobile Cambodians in Aranyaprathet, Sa Kaeo Province, Thailand. Southeast Asian J Trop Med Public Health. 2003; 34(1):48-53. View

14.

Brooker S, Leslie T, Kolaczinski K, Mohsen E, Mehboob N, Saleheen S . Spatial epidemiology of Plasmodium vivax, Afghanistan. Emerg Infect Dis. 2006; 12(10):1600-2. PMC: 1773016. DOI: 10.3201/eid1210.060051. View

15.

Peeters Grietens K, Xuan X, Van Bortel W, Ngo Duc T, Muela Ribera J, Ba Nhat T . Low perception of malaria risk among the Ra-glai ethnic minority in south-central Vietnam: implications for forest malaria control. Malar J. 2010; 9:23. PMC: 2823606. DOI: 10.1186/1475-2875-9-23. View

16.

Chaveepojnkamjorn W, Pichainarong N . Malaria infection among the migrant population along the Thai-Myanmar border area. Southeast Asian J Trop Med Public Health. 2004; 35(1):48-52. View

17.

Xu J, Liu H . Border malaria in Yunnan, China. Southeast Asian J Trop Med Public Health. 1998; 28(3):456-9. View

18.

Barat L . Four malaria success stories: how malaria burden was successfully reduced in Brazil, Eritrea, India, and Vietnam. Am J Trop Med Hyg. 2006; 74(1):12-6. View

19.

Garros C, Van Nguyen C, Trung H, Van Bortel W, Coosemans M, Manguin S . Distribution of Anopheles in Vietnam, with particular attention to malaria vectors of the Anopheles minimus complex. Malar J. 2008; 7:11. PMC: 2248199. DOI: 10.1186/1475-2875-7-11. View

20.

Trung H, Van Bortel W, Sochantha T, Keokenchanh K, Quang N, Cong L . Malaria transmission and major malaria vectors in different geographical areas of Southeast Asia. Trop Med Int Health. 2004; 9(2):230-7. DOI: 10.1046/j.1365-3156.2003.01179.x. View