BACTERIA PATHOGENIC FOR ANIMALS, NOT FOR MAN 203 



The pathologic actions are also similar. Field-mice are 

 immune, whereas for house and white mice the bacillus is fatal 

 in two to three days. 



Micrococcus of Mai de Pis (Nocard). Gangrenous 

 mastitis of sheep. 



Origin. In the milk and serum of a sheep sick with the 

 "mat de pis." 



Fig. 123. Bacillus of mouse septicemia, from the blood of a mouse (x 1000) 

 (Frankel and Pfeiffer). 



Form. Very small cocci seldom in chains. 



Properties. Immotile; liquefying gelatin. 



Growth. Growth occurs best between 20 and 37 C., is very 

 rapid, and irrespective of oxygen. 



Plates of Gelatin. White round colonies, some on the surface 

 and some in the deeper strata, with \owpower, appearing brown 

 surrounded by a transparent areola. 



