Costantini C, Sagnon N F, della Torre A, Diallo M, Brady J, Gibson G, Coluzzi M
Department of Biology, Imperial College of Science Technology and Medicine, University of London, United Kingdom.
Am J Trop Med Hyg. 1998 Jan;58(1):56-63. doi: 10.4269/ajtmh.1998.58.56.
The role of odors in mosquito host preferences was studied in a village near Ouagadougou, Burkina Faso. Two odor-baited entry-traps were put beside one another and a choice of host odor-laden air was blown out of them. Odors of a human and a calf (of similar mass) were drawn from two tents in which each was separately concealed. Allowances were made for trap position, differences in human-subject attractiveness, CO2 levels, and trap contamination with alternative host odors. Choices for the human-baited trap greater than the 0.5 random expectation were made by Anopheles gambiae s.l. (0.96) and An. pharoensis (0.68). The choices for the human-baited trap of Culex antennatus were significantly lower than 0.5 (0.25), whereas for the Cx. decens species group (0.56), the difference was not significant. Interpretation of the latter result was complicated by the significant effect of CO2 levels on the index. Species caught in low numbers but whose trap distribution showed a bias towards the human-baited trap were An. funestus (total numbers in the human-baited trap to the calf-baited trap = 9:0), Mansonia africana (17: 1), Aedes dalzieli (22:4), and Ae. hirsutus (13:1); species showing bias towards the calf-baited trap were An. rufipes (0:11), Cx. duttoni (0:17), and Cx. nebulosus (2:35). Mansonia uniformis was the only species distributed randomly between the two traps. Molecular identification of the An. gambiae s.l. samples revealed a marked difference in trap distribution: for the human-baited trap the ratio was 52% An. arabiensis to 48% An. gambiae s.s.; for the calf-baited trap, it was 92% An. arabiensis to 8% An. gambiae s.s.
在布基纳法索瓦加杜古附近的一个村庄，研究了气味在蚊子宿主偏好中的作用。两个装有气味诱饵的入口诱捕器并排放置，从诱捕器中吹出含有宿主气味的空气供蚊子选择。人类和小牛（体重相近）的气味分别从两个单独隐蔽的帐篷中抽取。考虑到诱捕器位置、人体吸引力差异、二氧化碳水平以及诱捕器被其他宿主气味污染的情况。冈比亚按蚊复合组（0.96）和法老按蚊（0.68）选择人类诱饵诱捕器的比例高于随机预期的0.5。触角库蚊选择人类诱饵诱捕器的比例显著低于0.5（0.25），而对于骚扰库蚊复合组（0.56），差异不显著。二氧化碳水平对该指标有显著影响，使得对后一结果的解释变得复杂。捕获数量较少但诱捕器分布偏向人类诱饵诱捕器的物种有：恶疟按蚊（人类诱饵诱捕器与小牛诱饵诱捕器中的总数之比为9:0）、非洲曼蚊（17:1）、达尔齐尔伊蚊（22:4）和多毛伊蚊（13:1）；诱捕器分布偏向小牛诱饵诱捕器的物种有：红足按蚊（0:11）、达顿库蚊（0:17）和朦胧库蚊（2:35）。均匀曼蚊是唯一在两个诱捕器之间随机分布的物种。对冈比亚按蚊复合组样本的分子鉴定显示诱捕器分布存在显著差异：在人类诱饵诱捕器中，阿拉伯按蚊占52%，冈比亚按蚊指名亚种占48%；在小牛诱饵诱捕器中，阿拉伯按蚊占92%，冈比亚按蚊指名亚种占8%。
