Antonio-Nkondjio C., Kerah C.H., Simard Frédéric, Awono-Ambene P., Chouaibou M., Tchuinkam T., Fontenille Didier. (2006). Complexity of the malaria vectorial system in Cameroon : contribution of secondary vectors to malaria transmission. Journal of Medical Entomology, 43 (6), p. 1215-1221. ISSN 0022-2585.
Titre du document
Complexity of the malaria vectorial system in Cameroon : contribution of secondary vectors to malaria transmission
Année de publication
2006
Auteurs
Antonio-Nkondjio C., Kerah C.H., Simard Frédéric, Awono-Ambene P., Chouaibou M., Tchuinkam T., Fontenille Didier
Source
Journal of Medical Entomology, 2006,
43 (6), p. 1215-1221 ISSN 0022-2585
Malaria transmission in Africa is a dynamic and complex system that is so far superficially understood. Further knowledge is required to improve control of the disease. In the present report, we highlight the contribution of the so-called "secondary" malaria vectors to the overall parasite transmission intensity in several sites across Cameroon, through a retrospective analysis of surveys from the Organisation de Coordination pour la lutte Contre les Endemies en Afrique Centrale database. In total, 48,490 female anophelines belonging to 21 different species were collected between October 1998 and March 2003. Anopheles gambiae Giles, Anopheles arabiensis Patton, Anopheles funestus Giles, Anopheles nili (Theobald), and Anopheles moucheti Evans represented 89% of the total anopheline fauna. Beside these major vectors, malaria parasites or their circumsporozoite proteins were found in nine secondary malaria vectors: Anopheles ovengensis Awono-Ambene et al., Anopheles carnevalei Brunhes et al., Anopheles coustani Laveran, Anopheles hancocki Edwards, Anopheles marshallii (Theobald), Anopheles paludis Theobald, Anopheles pharoensis Theobald, Anopheles well-cornei Theobald, and Anopheles ziemanni Grunberg. The mean infection rate of secondary vectors (1.36%) was significantly (P < 0.001) lower than that of major vectors (3.08%). An. pharoensis and An. ovengensis were repeatedly found infected by Plasmodium falciparum Welch and contributed substantially to the total malaria transmission intensity in some areas where they were abundant. Both species have strong exophilic and/or exophagic habits such that they might elude vector control directed against endophilic and endophagic malaria vectors.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
Localisation
Fonds IRD [F A010037713]
Identifiant IRD
fdi:010037713
