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Diamant, Ariel, John W. Fournie and Lee A. Courtney. 1994. X-Cell Pseudotumors in a Hardhead Catfish, Arius felis (Ariidae), from Lake Pontchartrain, Louisiana, U.S.A.. EPA/600/J-94/340. Dis. Aquat. Org. 18:181-185. (ERL,GB 856). (Avail. from NTIS, Springfield, VA: PB94-198165)

X-cell epidermal lesions are described from a single specimen of the hardhead catfish Arius felis (Aridae). The lesions exhibited an unusual growth pattern but did not involve any visceral organs. Histologically, the lesions resembled those previously described for coldwater fishes. This is the first report of X-cell lesions from Lake Pontchartrain, Louisiana, USA, and the hardhead catfish represents the first warmwater species affected with the disease.

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