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MULTIPLE BLOOD MEALS IN ANOPHELES DARLINGI (DIPTERA: CULICIDAE)
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Instituto Nacional de Pesquisas da Amazônia. Laboratório de Malária e Dengue. AM, Brazil
Instituto Nacional de Pesquisas da Amazônia. Laboratório de Malária e Dengue. AM, Brazil
Universidade Federal de São Carlos. Laboratório de Biologia Estrutural e Funcional. Sorocaba, SP, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa Rene Rachou. Laboratorio de Entomologia Medica. Belo Horizonte, MG, Brazil
University of California. Department of Molecular Biology and Biochemistry. Irvine, CA, U.S.A.
Instituto Nacional de Pesquisas da Amazônia. Laboratório de Malária e Dengue. AM, Brazil
Universidade Federal de São Carlos. Laboratório de Biologia Estrutural e Funcional. Sorocaba, SP, Brazil
Fundação Oswaldo Cruz. Centro de Pesquisa Rene Rachou. Laboratorio de Entomologia Medica. Belo Horizonte, MG, Brazil
University of California. Department of Molecular Biology and Biochemistry. Irvine, CA, U.S.A.
Resumo em Inglês
Anopheles darlingi is an important vector of human malaria in the Amazon. Adult females of this mosquito species require a blood meal to develop eggs, preferring humans to other blood sources. Although gonotrophic concordance has been described as the norm for An. darlingi, here we report An. darlingi female mosquitoes taking two or more blood meals within their first gonotrophic cycle. Only half of field-captured adult females fed one blood meal developed follicles to Christophers’ stage V. This outcome is dependent on larval nutrition, as 88% of laboratory-raised well-nourished females completed the first gonotrophic cycle with only one blood meal, while less nourished females needed additional blood meals. Half of the fieldcaptured blood-seeking An. darlingi females had follicles in intermediate (IIIa and IIIb) and final (V) stages of the gonotrophic cycle, supporting the conclusion that An. darlingi blood feed more than once during a gonotrophic cycle. Additionally, we observed females attempting to blood feed a second time during the same day. Additional studies of An. darlingi biting behavior are necessary to accurately estimate Plasmodium sp. entomologic inoculation rates throughout the An. darlingi vast geographical distribution.
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