Experiments to Test the Possibility of Transovarial Transmission of Yellow Fever Virus in the MosquitoAëdes (Stegomyia) AfricanusTheobald

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Abstract
The maintenance of yellow fever virus through relatively dry periods in small isolated strips of forest in Uganda is difficult to explain without postulating the existence of some unknown factor which serves to reintroduce virus either to the primate or to the mosquito population. Expts. included cases where the eggs concerned were laid after the extrinsic incubation-period in the mother-insect, the 2d generation had survived for a time at least equal to the extrinsic incubation-period and a fresh blood-meal had been taken by this 2nd generation. No yellow fever virus was recovered from the generation of A. africanus born of infected female mosquitoes.