Parity and gonotrophic discordance of females of Aedes aegypti and Aedes albopictus (Diptera: Culicidae) in the city of S ão Paulo, SP, Brazil

The objective of this study was to assess the parity, presence of blood in the stomach, and the gonotrophic discordance of females ofAedes aegypti andAedes albopictus captured in two areas of the city of S ão Paulo. The captures were undertaken monthly, by aspiration, in the period from January, 2015 to August, 2017. All the females of the two species had their midguts and ovaries dissected to determine the presence of blood and the parity/stage of maturation. With regard to parity, 27% and 34% of th e females ofAe. aegypti andAe. albopictus, respectively, were parous or were in advanced stages of the development of their ovaries (33% and 27%, respectively). The larger part of the females ofAe. aegypti andAe. albopictus contained blood in their stomachs (77% and 60%, respectively), beyond which 36% and 27% of the females ofAe. aegypti andAe. albopictus, respectively, were in gonotrophic discordance. Our results indicate favorable conditions in the study areas because of the presence of parous females. Moreover, this frequent and multiple contact ofAe. aegypti andAe. albopictus females with vertebrate hosts, such as humans, increases the possibility of transmitting the viruses they may be carrying.
Source: Journal of Vector Ecology - Category: Biology Authors: Tags: Original Article Source Type: research