The role of septic tanks in the spread of dengue

The implementation of a dengue control programme in Puerto Rico led to the discovery of previously unknown mosquito breeding sites underground. Research published in the March 2008 issue of Medical and Veterinary Entomology showed that large number of mosquitoes (Aedes aegypti), which transmit dengue fever to humans, were found to breed in septic tanks.

R. Barrera, M. Amador, A. Diaz, J. Smith, J. L. Munoz-Jordan, Y. Rosario (2008). Unusual productivity of Aedes aegypti in septic tanks and its implications for dengue control.
Medical and Veterinary Entomology ; vol. 22, no. 1 ; p. 62-69.

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