Abstract
Infection by the coccidian Cryptosporidium sp. was found in the stomach of cultured cichlid fry and fingerlings. Merogony and gamogony stages were located at the microvillous zone of the superficial cells of the stomach epithelium while oogony and sporogony stages were located intracellularly within the mucosal epithelium. Epithelially attached stages were covered by a microvillous membrane. These structural and developmental characteristics have not been reported previously in other Cryptosporidium species.

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