The hematological and immunological responses of 2 breeds of domestic sheep to feeding of indigenous mosquitoes and colonized Aedes dorsalis were studied. Records were kept of hematocrit, red cell counts, white cell counts, and differential counts for mosquito-exposed and protected sheep during the peak mosquito season. Skin sensitivity and passive cutaneous anaphylaxis tests of hypersensitivity to mosquito antigens were performed at the end of the season. Four weeks after initial mosquito exposure, a significant mild neutropenia was detected in exposed ewes. At the end of the trial, immediate, but not delayed, hypersensitivity to heterologous and homologous mosquito antigens was demonstrated in exposed sheep.
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Jones et al. (1987) studied this question.
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