54 



BACILLUS MESENTEBJCUS VULGATUS. 



Flugge. 



POTATO BACILLI'*. A GKOl'P OF ' 'POTATO BACILLl" ARE KNOWN WHICH 

 ll.\\'E MANY CIIAIIACTKRISTIC.S IN COMMON. 



Origin. Widely distributed in the soil, on surface 

 of potatoes in feces, putrid fluids, water, milk. 



Form. Small, thick rods, with rounded ends, usually 

 in pairs, inny form threads. 



Motility. Actively motile. 



Sporulation. Readily forms median, round spores. 

 The spores of one variety of " potato bacillus" described 

 by Globig. shoved enormous powers of existence, with- 

 standing the action of steam-heat for 5 to 6 hours. 



Anilin Dyes. React easily. 



Growth. Rapid. 



(,'i'Ut/in 7'Iott'x. Show yellowish white, slightly granular colonies, with 

 irregular borders. Liquefy rapidly and extensively. 



,S7/'>/< Cultures. Growth occurs along the entire line of inoculation, but 

 liquefaction is more energetic in the upper part. The liquefied gelatin 

 remains turbi'd for some time and a thin, grayish, folded scum forms on the 

 top. 



.S7/v/r CtiUii'rt'N.On ac/(ir, forms a dull white or grayish, folded growth. 

 On potato!*, the most characteristic growth develops. The surface is rapidly 

 covered with a thick, white, strongly folded, coherent growth. Later the 

 color become s ;i dirty brown or red. 



Milk. 1 coagulated. 



Oxygen requirements. A e robe. 



Temperature. ({rows at ordinary as well as higher 

 temperatures. 



Behavior to Gelatin. Liquefies rapidly. 

 Pathogenesis. No effect observed. 



