Epidemiology of malaria in Attapeu Province, Lao PDR in relation to entomological parameters》.pdf

Transactions of the Royal Society of Tropical Medicine and Hygiene (2005) 99, 833—839 Epidemiology of malaria in Attapeu Province, Lao PDR in relation to entomological parameters I. Vythilingama,∗, B. Sidavong b, S.T. Chana, T. Phonemixay b, V. Vanisaveth b c b a , P. Sisoulad , R. Phetsouvanh , S. Lokman Hakim , S. Phompida b a Infectious Diseases Research Centre, Institute for Medical Research, Jalan Pahang, 50588 Kuala Lumpur, Malaysia b Centre for Malaria, Parasitology and Entomology, Vientiane, Lao PDR c Malaria Station, Attapeu Province, Lao PDR Received 19 January 2005; received in revised form 30 May 2005; accepted 7 June 2005 Available online 19 August 2005 KEYWORDS Summary Surveys were conducted in malaria-endemic villages in the southern Malaria; province of Attapeu, Lao PDR during various seasons over a 3-year period. All-night Plasmodium falciparum; mosquito landing collections, blood surveys and a case—control study were con- Anopheles dirus A; ducted. Plasmodium falciparum was the predominant species, and slide positivity Lao PDR rates were higher during the transition/dry season compared with the wet sea- son. Anopheles dirus A was found to be the primary vector, and sporozoite rates were highest during the transition/dry season. Anopheles dirus was found to be endophagic and endophilic. Not using insecticide-treated bed nets, houses close to breeding sites and sleeping away from home were risk factors associated with malaria.