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Am. J. Trop. Med. Hyg., 79(5), 2008, pp. 652-654
Copyright © 2008 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT


Forest Malaria in Central Vietnam

Nguyen Hong Sanh, Nguyen Van Dung, Nguyen Xuan Thanh, Trieu Nguyen Trung, Truong Van Co, AND Robert D. Cooper*
Institute of Malariology, Parasitology, and Entomology, Qui Nhon, Vietnam; Military Preventive Medicine Centre, Ho Chi Minh City, Vietnam; Military Institute of Hygiene and Epidemiology, Hanoi, Vietnam; Australian Army Malaria Institute, Enoggera, Queensland, Australia

 

ABSTRACT

Studies were conducted in a village in central Vietnam to explain the existence of a forest malaria cycle of transmission external to the village. The findings suggested no malaria transmission in the village because of the absence of a suitable vector, but suggested evidence for transmission in villagers when attending garden plots in the forested hills surrounding the village. A sizeable population residing near these garden plots, the presence of Anopheles dirus (a highly efficient vector), and a degree of malaria immunity within the inhabitants created suitable conditions to sustain malaria transmission outside the village.

Received November 21, 2007. Accepted for publication August 13, 2008.

Acknowledgments: We thank Ngo Thi Huong, Nguyen Xuan Thien, Pham Phu Trong, Huynh Trong Dao, and Le Dinh Vinh (Institute of Malariology Parasitology and Entomology, Qui Nhon); Nguyen Van Minh (Military Preventive Medicine Centre); and Nguyen Chinh Phong (Military Institute of Hygiene and Epidemiology) for their support; and Drs. M. Edstein, K. Rieckmann, and D. Shanks (Australia Army Malaria Institute) for reviewing the manuscript.

Financial support: This study was supported by the International Policy Division, Australian Defence Force.

* Address correspondence to Robert D. Cooper, Australian Army Malaria Institute, Gallipoli Barracks, Enoggera, Queensland 4051, Australia. E-mail: bob.cooper{at}defence.gov.au

Authors’ addresses: Nguyen Hong Sanh, Trieu Nguyen Trung, and Truong Van Co, Institute of Malariology, Parasitology, and Entomology, Qui Nhon, 611B Nguyen Thai Hoc Street, Qui Nhon, Binh Dinh, Vietnam. Nguyen Van Dung, Military Preventive Medicine Centre, 168BIS Phan Van Tri Street, Ward 5, GV District, Ho Chi Minh City, Vietnam. Nguyen Xuan Thanh, Military Institute of Hygiene and Epidemiology, 21 Trung Liet Street, Dong Da, Hanoi, Vietnam. Robert D. Cooper, Australia Army Malaria Institute, Gallipoli Barracks, Enoggera, Queensland 4051, Australia.






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