Experimental Transmission of Toxoplasma Gondii by Filth-Flies

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  • Pacific Research Section, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Honolulu, Hawaii 96806

Two species of filth-flies, Musca domestica and Chrysomya megacephala, were evaluated for their abilities to acquire and transmit the oocyst of Toxoplasma gondii from the feces of experimentally infected cats. M. domestica contaminated milk with viable Toxoplasma oocysts for about 24 hours after last contact with infectious cat feces and C. megacephala for as long as 48 hours afterwards. Toxoplasma was isolated from larvae and pupae reared in infectious cat feces, but not from newly emerged adult flies.