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The susceptibility of two Aedes (Stegomyia) species, Ae. aegypti and Ae. albopictus, to infection with dengue virus was assessed using both natural feeding on a viraemic gibbon and a membrane feeding technique. Both species were highly susceptible to dengue virus infection. It was found that both species were more sensitive than the LLC-MK2 cell plaque assay system used in detecting viraemia in a gibbon infected with a low tissue culture passage strain of dengue-2 virus. However, the same strain passaged in LLC-MK2 cells failed to infect either species when the mosquitoes were fed upon a suspension of this virus. Both species were infected readily when fed upon a suspension of a mouse adapted strain of dengue-2 virus.
Whitehead et al. (Fri,) studied this question.