SCHIZOPHYTA— SCHIZOMYCETES 175 



Animals immune. None of the higher animals contract the disease when 

 the organism is inoculated. 



Pathogenesis. Destroys the larva of the honey bee. 

 Immunity. Not known. 



Bacillus larvae, White 



Disease produced. American foul brood. 

 Animal infected. Honey bee. 

 Animals immune. All higher animals. 

 Pathogenesis. Destroys the larva of the honey bee. 

 Poisonous properties. Not known. 

 Immunity. Not known. . 



Bacillus antliracis-symptomatici, Kruse 



Disease produced. Black leg. Quarter evil or symptomatic anthrax. 



Animals commonly infected. Cattle. 



Animals susceptible. Guinea pig, hog, dog, and rabbit. 



Animals immune. Bird, horse, goat. 



Pathogenesis. Irregular emphysematous pustules and areas. Muscles con- 

 tain dark areas with blood serum and gas bubbles. 



Poisonous properties. Doubtful, probably an endo-toxin. 



Immunity. Established by vaccination with the Bacillus attenuated by 

 exposure to heat and drying. 



Bacillus oedematis, Zopf 



Disease produced. Malignant oedema. 



Animals infected. Horse, sheep, goat, mouse, guinea pig, rabbit, dog, pig, 

 chicken, and pigeon. 



Animals immune. Cattle. 



Pathogenesis. There is little blood infection by the organism, but a general 

 emphysema of the sub-cutaneous tissues, the gas bubbles being usually very 

 numerous. Any of the body tissues may be affected. 



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U0 



Fig. 30b. Malignant Oedema. Bac- Fig. 30c. Malignant Oed- 

 illus oedematis maligni, A. Frorn ema. Bacillus oedemati ma- 

 spleen of guinea pig. B. From lung ligni. Spores and rods. Af- 

 of mouse. Both x 700. After Koch. ter Abbott. 



Poisonous properties. Not definitely known. 



Immunity. Immunization may be affected by vaccination with attenuated 



cultures. Attenuation is arrived at by passage of the organism through white 

 rats. 



