Microhic Diseases Individually Considered. 211 



«k / 



The mesenteric and bronchial lymphatic glands are 

 tumefied and sometimes partly caseous. 



31icrobe.—ThQ 

 germ of pneumo- Fig. 9. 



enteritis belongs to 

 the group of bac- 

 teria showing a clear 

 central space, that 

 is, those which take 

 the stain better at 

 their margins than 

 in the center. It is 

 ovoid, measures 1/i 

 to 2/i in length by 

 0-4/^ to 0*6/i in thick- 

 ness. It is motile, 

 aerobic and facul- Hog cholera bacilli in spleen of guinea 

 tatively anaerobic, pis; cover-glass preparation. X 1200.— D. 



It does not form spores. 



Action of physical and chemical agents. — The bacillus 

 of pneumo-enteritis is destroyed by a temperature of 

 58°, maintained during from fifteen or twenty minutes. 

 It preserves its vitality in spite of desiccation for 

 nearly two months. It vegetates and multiplies in 

 water at the ordinary temperature of summer ; it re- 

 tains its vitality for more than fifteen days in sterilized 

 water. 



Those authors who have studied the action of chem- 

 ical agents on this microbe especially recommend for 

 its destruction mineral acids and sulfate of copper. 

 MM. Cornil and Chantemesse recommend the follow- 

 ing solution for the disinfection of pens and other in- 

 fected objects : 



