Lemasson Jean-Jacques, Fontenille Didier, Lochouarn Laurence, Dia Ibrahima, Simard Frédéric, Ba Khalilou, Diop A., Diatta Mathurin, Molez Jean-François. (1997). Comparison of behavior and vector efficiency of Anopheles gambiae and An. arabiensis (Diptera : Culicidae) in Barkedji, a Sahelian area of Senegal. Journal of Medical Entomology, 34 (4), p. 396-403. ISSN 0022-2585.
Titre du document
Comparison of behavior and vector efficiency of Anopheles gambiae and An. arabiensis (Diptera : Culicidae) in Barkedji, a Sahelian area of Senegal
Année de publication
1997
Auteurs
Lemasson Jean-Jacques, Fontenille Didier, Lochouarn Laurence, Dia Ibrahima, Simard Frédéric, Ba Khalilou, Diop A., Diatta Mathurin, Molez Jean-François
Source
Journal of Medical Entomology, 1997,
34 (4), p. 396-403 ISSN 0022-2585
The ecology, population dynamics, and malaria vector efficiency of Anopheles gambiae and An. arabiensis were studied for 2 yr in a Sahelian village of Senegal. Anophelines were captured at human bait and resting indoors by pyrethrum spray. Mosquitoes belonging to the An. gambiae complex were identified by polymerase chain reaction. Of 26,973 females, An. arabiensis represented 79% of the mosquitoes captured and remained in the study area longer than An. gambiae after the rains terminated. There were no differences in nocturnal biting cycles or endophagous rates between An. gambiae and An. arabiensis. Based on an enzyme-linked immunosorbent assay test of bloodmeals, the anthropophilic rate of these 2 vectors were both approximately 60%, when comparisons were made during the same period. Overall, 18% of the resting females had patent mixed bloodmeals, mainly human-bovine. The parity rates of An. gambiae and An. arabiensis varied temporally. Despite similar behavior, the Plasmodium falciparum circumsporozoite protein (CSP) rates were different between An. gambiae (4.1%) and An. arabiensis (1.3%). P. malariae and P. ovale only represented 4% of the total Plasmodium identified in mosquitoes. Transmission was seasonal, occurring mainly during 4 mo. The CSP entomological inoculation rates were 128 bites per human per year for the 1st yr and 100 for the 2nd yr. Because of the combination of a high human biting rate and a low CSP rate, An. arabiensis accounted for 63% of transmission. Possible origin of differences in CSP rate between An. gambiae and An. arabiensis is discussed in relation to the parity rate, blood feeding frequency, and the hypothesis of genetic factors. (Résumé d'auteur)
Plan de classement
Epidémiologie du paludisme [052ANOPAL03]
Descripteurs
PALUDISME ; VECTEUR ; TRANSMISSION ; FEMELLE ; DYNAMIQUE DE POPULATION ; VARIATION TEMPORELLE ; ETHOLOGIE ; PREFERENCE TROPHIQUE ; CAPACITE VECTORIELLE
Description Géographique
SENEGAL ; ZONE SAHELIENNE
Localisation
Fonds IRD [F B010015505] ;
Dakar
;
Montpellier (Centre IRD)
Identifiant IRD
fdi:010015505
