206 SPECIAL BACTERIOLOGY 



Micrococcus Ureae Liquefaciens (Flugge). Cocci 1-25 to 2 //, 

 in diameter, occurring either singly or in small chains or irregular 

 groups. It liquefies gelatine media slowly. 



Bacillus Ureas (Leube). Forms plump rods 1 p thick with rounded 

 ends, and grows on the surface of gelatine without liquefying the 

 medium. 



UROBACILLUS PASTEURI. 



Found in putrid urine. 



The bacilli are motile and of various lengths, and form threads. 

 Spores are present, situated at one end of the rod. Urea is decom- 

 posed by the action of the organism. 



BACILLUS GLISCHROGENUS. 



Found in slimy urine. 



It is motile, and forms in urine, milk, and solutions of starch a slimy 

 substance. 



Pathogenesis. When injected into dogs it causes nephritis ; in 

 other animals pyrogenic changes usually result. 



The Chief Bacteria occurring in Air, Soil, and Water. 

 I. BACILLI. 



1. Nutrient Gelatine is not Liquefied, 

 (a.) CHROMOGENIC. 



Bacillus Auranticus. Small thick rods, exhibiting slight motility. 



On Plate Cultures superficial button-shaped, orange-coloured colonies 

 develop. 



In Gelatine Stab Cultures it exhibits a shiny orange-coloured growth. 



In Bouillon the growth is very characteristic, the fluid remaining 

 clear, but a membrane with isolated orange-coloured specks forms on 

 the surface, and a somewhat clear layer in the bottom of the tube. 



Bacillus Constrictus. This name is applied owing to the peculiar 

 appearance of the organism when stained by Zimmerman's method. 

 The bacilli exhibit a slight constriction between the individuals, being 

 united in short pointed chains possessing a rod-like appearance. The 

 colonies on plate cultures appear as granular discs with ragged edges, 

 varying in colour from a yellowish-grey to a sulphur-yellow. 



