United States Department of the Interior, Fred A. Seaton, Secretary 



Fish and Wildlife Service, Arnie J. Suomela, Commissioner 

 Bureau of Sport Fisheries and Wildlife, Daniel H . Janzen, Director 



MYCOBACTERIAL INFECTIONS IN ADULT SALMON 

 AND STEELHEAD TROUT RETURNING TO 

 THE COLUMBIA RIVER BASIN AND OTHER AREAS 

 IN 1957 



By 

 A. John Ross-, Brian J. Earp=- , and James W. Wooc£' 



Special Scientific Report --Fisheries No. 332. 



1/ Bureau of Sport Fisheries and Wildlife, Seattle, Wash. 

 2/ Washington State Department of Fisheries, Seattle, Wash. 

 3/ Oregon Fish Commission, Oakridge, Oregon 



Washington, D. C. 



December 1959 



