UNITED STATES DEPARTMENT OF THE INTERIOR, Douglas McKay, Secretary 

 FISH AND WILDLIFE SERVICE, Albert M. Day, Director 



A CONTAGIOUS DISEASE OF SALMON 

 POSSIBLY OF VIRUS ORIGIN 



By R. R. Rucker, W. J. Whipple, J. R. Parvin 

 and C. A. Evans 





FISHERY BULLETIN 76 



From Fishery Bulletin of the Fish and Wildlife Service 



VOLUME 54 



UNITED STATES GOVERNMENT PRINTING OFFICE • WASHINGTON : 1953 



For sale by the Superintendent of Documents, U. S. Government Printing Office, Washington 25, D. C. 



Price 15 cents 



