CHAPTER XXXIII 

 OTHER IMPORTANT PATHOGENIC MICRO-ORGANISMS 



In addition to the micro-organisms already described, 

 the following are important ones pathogenic for man: 



Colon Bacillus. — A rather plump, Gram-negative 

 bacillus, normally occupying the intestines of man and 

 animals, and capable of producing infection in man. 



Fig. 54. — Colon bacillus; twenty-four-hour agar culture; X 650 



(Heim). 



Occasionally this organism produces infection in man, 

 the commonest form being pyelitis (inflammation of the 

 funnel-shaped urinary tube connecting the kidney with 

 the ureter) and cystitis. 



The presence of colon bacilli is used in sanitary water 

 examinations as an indication of fecal pollution. Pro- 



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