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Grizzle, J.M., T.E. Schwedler and A.L. Scott. 1981. Papillomas of Black Bullheads, Ictalurus melas (Rafinesque), Living in a Chlorinated Sewage Pond. J. Fish Dis. 4(4):345-351. (ERL,GB X250).

Papillomas on brown bullheads, Ictalurus nebulosus (Le Sueur), and yellow bullheads, Ictalurus natilis (Le Sueur), have been reported frequently in certain areas of eastern North America. The papillomas of black bullheads, Ictalurus melas (Rafinesque), described herein are noteworthy because of their frequency and uniformity of location.

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