Respiratory Cryptosporidiosis in a Peacock Chick

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Abstract
Respiratory cryptosporidiosis was diagnosed in a 2 wk old peacock chick whose symptoms were a gurgling respiration, coughing and sneezing and a serous oculonasal discharge. Light microscopy detected cryptosporidial-like organisms attached to the surface of conjunctival, nasal-sinus and tracheal-epithelial cells; EM demonstrated stages typical of cryptosporidial trophozoites, schizonts and oocysts. About 30 other in-contact peacock chicks developed the same clinical symptoms and all died despite treatment with oxytetracycline HCl at 200 ppm in the drinking water.

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