Abstract
Haemogregarine parasites, derived from the Florida snakes Coluber constrictor and Nerodia fasciata and ingested by Aedes aegypti, completed sporogony within the hemocoeles of nearly all fed mosquitoes in 14–18 days, and produced oocysts typlcal of Hepatozoon. However, mortalities and morbidity were high in the Culex which had fed on the Coluber. Oocysts were not found in any Ornithodoros turicata (Argasidae) which fed upon either snake host, but many sections of fed ticks had gametocyte-like cells within the gut lumen. Most lizards, Anolis carolinensis and Anolis sagrei, infected per os with oocysts derived from both snake species developed infections. Infections in the lizards were largely confined to hepatic schizonts with few parasites found in erythrocytes. Unlike naturally infected snake hosts, Hepatozoon schizonts in livers of lizards were often either surrounded by an unidentified dark pigment or heavily infiltrated with mononuclear inflammatory cells.
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