Horizon 1 1 17 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES American Journal of Tropical Medicine and Hygiene 1023-1029 2009 fdi:010048471 ENG American Journal of Tropical Medicine and Hygiene 0002-9637 ISI:000272709600016 6 10.4269/ajtmh.2009.09-0124 https://www.documentation.ird.fr/hor/fdi:010048471 https://horizon.documentation.ird.fr/exl-doc/pleins_textes/divers20-08/010048471.pdf 81 Horizon (IRD) To test for the effects of host accessibility oil blood-feeding behavior, we assessed degrees of anthropophily of the malaria mosquito Anopheles gambiae at two stages of the behavioral sequence of host foraging in a rice growing area near Bobo-Dioulasso, Burkina Faso, where humans are not readily accessible because of years of generalized use of (mostly non-impregnated) bed nets. First, patterns of lost selection were assessed by the identification of the blood meal origin of indoor-resting samples. Inherent host preferences were then determined by two odor-baited entry traps, set side by side in a choice arrangement, releasing either human or calf odor. The proportion of feeds taken oil humans was around 40%, whereas 88% of trapped An. gambiae "chose" the human-baited trap, indicating a zoophilic pattern of host selection despite a stronger trap entry response with human odor. This paradox can be interpreted as the evolution of a plastic strategy of feeding behavior in this field population of An. gambiae because of the greater accessibility of readily available, although less-preferred, hosts. 052 UR165 / UR016 Burkina Faso / Cameroun