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  • 1
    ISSN: 1570-7458
    Keywords: Culex quinquefasciatus ; Culicidae ; host preference ; human ; calf ; goat ; host odour ; carbon dioxide ; Tanzania
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Field experiments to determine the host preference of Culex quinquefasciatus Say (Diptera: Culicidae) between man, calf and goat, were conducted in Muheza, north-east Tanzania. The responses of the mosquito to the three hosts were also compared to their responses to carbon dioxide. A total of 2565 unfed female mosquitoes were collected, of which Cx quinquefasciatus accounted for 96.6% of the catch. A human-baited tent caught a larger number of host-seeking Cx quinquefasciatus than a calf-baited or goat-baited tent (P〈0.05). The man:calf ratio was 7.8:1 while the man:goat ratio was 10:1. The difference in response to either a calf- or goat-baited tent was not statistically significant (P〉0.05). The number of mosquitoes attracted to a human-baited tent was significantly larger than that attracted to carbon dioxide released at 300 ml min−1. Only 25.3% of the human host attractancy was attributed to carbon dioxide. The number of Cx quinquefasciatus responding to a tent baited with a calf or goat was not significantly different from the number responding to a tent baited with carbon dioxide. It can be concluded that with equal availability of the three vertebrate hosts, Cx quinquefasciatus would respond more to volatile cues from a human host than from either a calf or goat, thereby supporting earlier data about its high degree of anthropophily. The major olfactory cue from a goat or a calf to which this mosquito responds is probably carbon dioxide.
    Type of Medium: Electronic Resource
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