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Distribution of mosquitoes in relation to urban landscape characteristics

  • R.M. Gleiser (a1) (a2) and L.P. Zalazar (a1)

The current global increase in prevalence of vector borne diseases, as well as an expansion of tropical infections to more temperate zones, justifies further studies on vector populations. Urban areas may favour viral transmission to humans through close contacts between the vectors and the vertebrate hosts, and also affecting mosquito populations by offering larval habitat, refuges and adequate microclimates to survive the winter. This work analyses the spatial distribution of potential vector mosquitoes in relation to landscape characteristics in an urban environment in a temperate climate region. Mosquitoes were trapped monthly from October 2005 to March 2006 in 25 sites within Córdoba city and suburbs with miniature light traps+CO2. Nine species were collected, and the most abundant were Culex quinquefasciatus (37.1%), C. apicinus (26.6%) and Aedes aegypti (13.9%). Species that may be involved in SLEv transmission were recorded throughout the sampling. C. quinquefasciatus was detected in 92% of the sites; however, only two sites showed consistently larger collections. The site of highest C. quinquefasciatus abundance was located within an area of high Saint Louis Encefalitis virus prevalence and risk of infection, further supporting this species involvement as a vector. Significant correlations were detected between land cover characteristics and abundance of C. apicinus, C. interfor and C. maxi that were consistent with previous knowledge about their larval habitat and domestic preferences, which may be useful for targeting vector control operations.

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Bulletin of Entomological Research
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