UNITED STATES DEPARTMENT OF THE INTERIOR, STEWART L . UDALL, SECRETARY 

 Fish and Wildlife Service, Clarence F. Pautzke, Commissioner 

 Bureau ofSport Fisheries and Wildlife, Daniel H . Janzen, Director 



WHIRLING DISEASE OF TROUTS CAUSED BY MYXOSOMA 



CEREBRALIS IN THE UNITED STATES 

 By 

 Glenn L. Hoffman, Clarence E. Dunbar, and Arthur Bradford 



Special Scientific Report --Fisheries No. 427 



Washington, D. C , 

 June 1962 



