20 
This organism, however, failed to show pathogenicity on laboratory animals. 
The uniformity of the pathologic picture in these birds, conforming in many 
respects with that of leukemia, the finding of Bacterium sanguinarium, if only 
in three of the eleven, seemed to justify the conclusion that we are dealing with 
a limited epidemic of acute infectious leukemia. Bacteria could not be found 
in the parenchymatous cell masses, but in the intestinal wall short polar 
staining bacteria could be found corresponding to the morphology of the 
isolated organism. 
Respectfully submitted, 
HERBERT FOX, M. D., 
Pathologist, 
