OTHER IMPORTANT PATHOGENIC MICRO-ORGANISMS 175 



phylaxis is similar to that discussed under Typhoid 

 Bacilhis. 



Pneumobacillus of Friedlander. — A short bacillus, 

 often occurring in pairs or chains of four, capsulated, 

 and Gram-negative. Found in certain cases of pneu- 

 monia and pleurisy. Prophylaxis is similar to that dis- 

 cussed under the Pneumococcus. 



9 / 



Fig. 55. — Friedlander's pneumobacillus. Welch's capsule stain; 

 X 1100 (Jordan). 



Paratyphoid Bacilli. — Similar to typhoid bacilli and 

 colon bacilli, and producing infections in man resembling 

 typhoid fever or, at times, symptoms of epidemic meat- 

 poisoning. Prophylaxis is discussed under Typhoid 

 Bacillus and under Bacterial Food Poisoning. 



Influenza Bacillus (Pfeiffer's Bacillus). — A very small, 

 moderately thick bacillus, growing only on media contain- 

 ing blood (hence spoken of as a ''hemophilic" bacillus), and 

 occurring chiefly in inflammations of the respiratory pass- 



The opinion is gaining ground that influenza is caused 



