184 DYSENTERY, HOG AND CHICKEN CHOLERA. 



are limited to the intestines, having the appearance of true 

 cholera. 



Protective inoculations have been performed by using atten- 

 uated cultures, the attenuation being arrived at, as recom- 

 mended by Pasteur, by using cultures two or three months 

 old. This bacillus has been used extensively in Australia 

 for the destruction of rabbits. It is said that Avith two 

 gallons of a bouillon culture as many as 2000 rabbits may be 

 destroyed. 



This bacillus has been described by different authors under 

 a number of names : as the bacillus of rabbit septicaemia, by 

 Koch ; the bacillus of swine plague, by Loeffler ; Bacilli cuni- 

 cucilidi, by Fluegge, and others. 



QUESTIONS. 

 Dysentery. 



When and by whom was the Bacillus dysentericse discovered and described ? 



What is its morphology ? 



How does it stain ? 



Give its principal biologic characters. 



How does it grow on agar ? On potato ? On bouillon ? In litmus milk ? 



Does it produce indol? 



Does its serum have an agglutinating power ? 



What is the effect of an intraperitoneal injection in animals? Of a sub- 

 cutaneous injection ? 



How are animals affected by feeding of the bacilli ? 



Where is the toxin of the Bacillus dysentericse contained ? 



May animals be immunized against dysentery by inoculation with Bacil- 

 lus dysentericse ? 



What claims are made for the serum of inoculated animals ? 



Hog Cholera. 



By whom was the bacillus of hog cholera discovered ? 

 Give its morphology. Its staining. Its principal biologic characters. 

 How does it grow on gelatin and agar ? On potato ? In bouillon ? In 

 milk? 



Does it produce gases? 



What is its thermal death -point? 



How does it affect laboratory animals? 



Has immunity been produced by injections of cultures of this bacillus ? 



Has a toxin been isolated from the bacillus of hog cholera ? 



What are the properties of the serum of immunized animals? 



