176 MANUAL OF POISONOUS PLANTS 



Bacillus murisepticus, Koch 



Disease produced. Mouse septicemia. 



Animals susceptible. Hog, rabbit, mouse, white rat, pigeon, and sparrow. 



Animals immune. Horse, cow, ass, guinea pig, cat, chicken, and goose. 



Pathogenesis. The organism has been isolated from poisonous meat. In- 

 oculations produce a true bacteremia. Microscopic examination shows the organ- 

 ism to be present principally in the capillaries. The spleen is enlarged, but 

 otherwise, the internal organs show no characteristic lesions. 



Poisonous properties. Unknown. 



Immunity. Vaccination with killed or attenuated cultures, immunizes, but 

 the serum of immunized animals possesses little curative power. 



Bacillus psitticosis, Nocard 



Disease produced. Epidemic pneumonia contracted from diseased parrots. 

 Animals infected naturally. Parrots and man. 



Animals susceptible. White and gray mouse, pigeon, rabbit, and guinea pig. 

 Animals immune. The dog is partially immune. 



Pathogenesis. The disease is a true bacteremia, being associated in man 

 with pneumonia. 



Poisonous properties. Not known. 

 Immunity. 



Bacterium influcnzae, Lehman & Neumann 



Disease produced. Influenza in man. 



Animals susceptible. Rabbit, and guinea pig. 



Animals immune. Most of the other laboratory animals. 



Pathogenesis. Produces purulent bronchitis, and pneumonia. Sometimes 

 there is metastatic infection of other organs producing diseases such as en- 

 docarditis. 



Poisonous properties/ The toxin is intracellular, probably an endotoxin. 



Immunity. Vaccination and inoculation do not confer a lasting immunity, 

 in fact, infection in many cases tends to predispose to the disease. 



Bacterium cancrosi, Kruse 



Disease produced. Chancroid, or soft chancre. 



Animals infected. Man. 



Animals susceptible. Some of the monkeys. 



Animals immune. Other laboratory animals. 



Pathogenesis. Disease produced appears first as a small red, papule which 

 becomes larger, and ulcerates. The inguinal and other lymph nodes enlarge and 

 ulcerate. Primary infection most frequently upon the genitalia, other tissues 

 not frequently involved. 



Poisonous properties. Not known. 



Immunity. Acquired. 



Bacterium pncuinoniae, Zopf 



Disease produced. Pneumonia. 



Animals infected. Man. 



Animals susceptible. Guinea pig, and rabbit. 



