INFLUENZA. 19:1 



not give the " cholera red " reaction, with the exception of 

 the first named. The spirillum of Metchnikoff is very 

 poisonous to pigeons, which are not susceptible to the cholera 

 vibrio. 



QUESTIONS. 



When and by whom was the Spirillum cholerse Asiatics (comma bacillus) 

 discovered ? 



Describe the spirillum. 



What is the peculiar arrangement of the bacteria in cultures and secre- 

 tions ? 



How does the comma bacillus stain ? 



Does it contain spores? 



Has it flagella ? 



How does it behave in the presence of oxygen? 



Is it motile ? 



What condition of the media is necessary for its growth? 



How does it grow on gelatin plates ? In stab- cultures? On agar? In pep- 

 tone-bouillon ? 



At what temperature does it grow ? 



What is its thermal death-point ? 



What is the effect of cold ? Of dryness ? 



How long may it be kept in a moist state ? 



How does it grow when associated with other bacteria ? 



What peculiarities of its growth are made use of in those cases to isolate it? 



What is the cause of the natural immunity of domestic animals to cholera ? 



How has Koch succeeded in inoculating the lower animals through the 

 stomach ? 



What effect has inoculation of animals with cultures of the comma bacillus? 



What is the effect of intraperitoueal inoculation ? 



How are animals made immune against cholera inoculation? 



What is the effect of the blood-serum of immunized animals on other 

 animals? 



Where are the organisms found in cholera patients or at the autopsy in a 

 cholera case ? 



How is the cholera bacillus isolated from cholera dejecta? 



How much resisting power has the comma bacillus? 



What is Haffkine's method of protection against cholera? 



OHAPTEli XX. 



INFLUENZA. 

 Bacillus of Influenza. 



History. In 1892 Pfeiffer and Cannon independently iso- 

 lated from the bronchial and nasal secretions of cases of 

 influenza, and from the blood in some cases, a small micro- 

 is M. B. 



