Publication: Effect of size and geographic origin of Aedes aegypti on oral infection with dengue-2 virus
Issued Date
1998-01-01
Resource Type
ISSN
00029637
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2-s2.0-0031896787
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Mahidol University
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SCOPUS
Bibliographic Citation
American Journal of Tropical Medicine and Hygiene. Vol.58, No.3 (1998), 283-286
Suggested Citation
Wanchad Sumanochitrapon, Daniel Strickman, Ratana Sithiprasasna, Pattamaporn Kittayapong, Bruce L. Innis Effect of size and geographic origin of Aedes aegypti on oral infection with dengue-2 virus. American Journal of Tropical Medicine and Hygiene. Vol.58, No.3 (1998), 283-286. doi:10.4269/ajtmh.1998.58.283 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/18408
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Title
Effect of size and geographic origin of Aedes aegypti on oral infection with dengue-2 virus
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Abstract
Differences in larval habitats cause variation in the size of Aedes aegypti (L.) adults. We suspected that such size variation was related to the ease with which the mosquitoes could be infected with dengue virus. Using a rearing procedure that produced three distinct size classes of mosquitoes, we determined the percentage of mosquitoes that developed disseminated dengue-2 infection following oral feeding with a suspension containing 3.3 x 107plaqueforming units/ml. Mosquitoes were reared from eggs deposited by females captured in either of two villages in Chachoengsao Province or in Bangkok, Thailand. More of the larger mosquitoes (10.7%) were infected than the medium (5.6%) or small (5.7%) mosquitoes. Mosquitoes from Bangkok were less easily infected (5.0%) than mosquitoes from either of the two villages (8.5% and 10.7%). These results suggest that quantitative risk assessment of dengue transmission may be very difficult unless inoculation rate is measured directly. Also, control procedures that reduce density of larvae in individual containers may exacerbate dengue transmission by creating larger mosquitoes that are more easily infected.