CHAPTER XXXVI. 



BUBONIC PLAGUE BACILLUS YELLOW FEVER 

 BACILLUS WHOOPING-COUGH BACILLUS. 



BACILLUS OF BUBONIC PLAGUE (Bacillus Pestis 

 Bubonicse Kitasato ; Bacterium Pestis). 



DISCOVERED simultaneously by Kitasato and Yersin 

 (1894) during an epidemic of the bubonic plague in 

 China. It is found in large numbers in the pus from 



FIG. 82. 



Bacillus of bubonic plague. X 1000 diameters. 



the buboes characteristic of this disease and in the 

 lymphatic glands; more rarely in the internal organs 

 and in the blood, in which it occurs in acute hemor- 



