CONTENTS 



Page 



Outbreak of disease at the Leavenworth station, 1951 35 



Disease among blueback-salmon fingerlings 35 



Appearance of diseased fish 36 



Therapeutic tests 37 



Experimental transmission 38 



Disease among kokanee fingerlings 38 



Appearance of diseased fish l 3d 



Experimental transmission 39 



Outbreak of disease at the Winthrop station, 1949-51 41 



Blueback brood of 1950 41 



Blueback brood of 1948-_ 41 



Blueback brood of 1949 43 



Kokanee brood of 1949 43 



Experimental transmission 43 



Relation to epizootic at Leavenworth 1 43 



Discussion 44 



Summary 45 



Literature cited.. 46 



