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Am. J. Trop. Med. Hyg., 67(1), 2002, pp. 85-92
Copyright © 2002 by The American Society of Tropical Medicine and Hygiene

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American Journal of Tropical Medicine and Hygiene, Vol 67, Issue 1, 85-92
Copyright © 2002 by American Society of Tropical Medicine and Hygiene

Research Articles


Variation in vector competence for dengue 2 virus among 24 collections of Aedes aegypti from Mexico and the United States

KE Bennett, KE Olson, L Munoz Mde, I Fernandez-Salas, JA Farfan-Ale, S Higgs, Black WC 4th, and BJ Beaty

Aedes aegypti from 24 collections in Mexico and the United States were challenged orally with dengue 2 virus JAM1409 (DEN-2 JAM1409). The vector competence (VC) of the populations ranged from 24% to 83%. Mosquito populations from the Yucatan exhibited greater VC than those from other areas of Mexico. The presence or absence of a midgut infection barrier (MIB) and a midgut escape barrier (MEB) was determined for mosquitoes in each population. The percentage of mosquitoes exhibiting an MIB ranged from 14% to 59%, and those exhibiting an MEB ranged from 4% to 43% in the collections. The MIB and MEB were not completely independent as determined by regression analysis. Midgut infection rates were dose dependent.


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