DESCRIPTION OF SPECIES. 



525 



Colonies circular, later irregular, 

 granular, strongly refractive and 

 yellowish - brown. They are 



probably identical with Bacillus coli 

 communis. 



They were isolated from cases of 

 cholera at Naples. 



Bacillus necrophorus (Loffler). 

 Rods and filaments. 



They cannot be cultivated on the 

 ordinary media. In rabbit broth 

 they give rise to fluify masses of 

 filaments. 



Intravenous injection produced 

 in rabbits a pysemic condition in 

 about a week. The bacilli were 

 found in the pus. 



They were isolated from a rabbit 

 which had been inoculated with 

 fragments of a condyloma. 



Bacillus nitrificans (Wino- 

 gradsky). Very small rods -5 /* in 

 in length, singly and in zooglcea. 



Colonies in silica jelly are 

 lenticular, and sub-cultures in liquid 

 media produce a gelatinous de- 

 posit. They are powerful oxidising 

 agents. 



They were isolated from the soil. 



Bacillus nodosus parvus 

 (Lustgarten). Rods 1-2 to % 2'4 p in 

 length, -4 p in width ; singly and 

 in pairs. 



Inoculated in the depth of agar 

 they produce a white filament in 

 the track of the needle composed 

 of crowded colonies, and on the 

 surface a hemispherical glistening 

 growth. 



They were isolated from the 

 human urethra. 



Bacillus nubilus(Frankland). 

 Slender rods 3 p. long and '3 /z wide, 

 and threads. Single bacilli have an 

 active rotatory movement, but the 

 long threads in broth cultures are 

 quite motionless. Spore-formation 

 not observed. 



The colonies appear as cloudy 

 undefined patches, which rapidly 

 liquefy the gelatine. They consist 

 of a tangled mass of threads. 



Inoculated in the depth of gela- 

 tine they produce along the track 

 of the needle horizontal circular 

 plates, with a delicate cloud-like 

 appearance, and liquefaction at the 



upper part. Later the whole of 

 the gelatine is liquefied. 



On agar they form a thin opales- 

 cent blue-violet film, the edges of 

 which exhibit later a distinct violet 

 fluorescence. 



On potato there is a slightly 

 yellow growth which is scarcely 

 visible. 



Broth is rendered turbid with a 

 dirty-white deposit, the surface 

 being covered by a thin pellicle. 



They occur in water. 



Bacillus ochraceus (Zimmer- 

 mann). Rods 1-25 to 4*5 \i in 

 length ; -65 to '75 \L in width ; 

 singly, in pairs, chains, and fila- 

 ments ; capsulated. 



Colonies circular, granular, yel- 

 low, liquefying. 



Inoculated in the depth of gela- 

 tine they produce liquefaction in 

 the track of the needle, and a. 

 yellow deposit. 



On agar and potato the growth 

 is yellow ochre in colour. 



They occur in water. 



Bacillus oedematis aerobicus 

 (Klein). Rods '8 to 2-4 /x in length, 

 7 fj. wide, and long filaments. 



Colonies greyish, transparent, 

 with irregular contour. 



In the depth of gelatine a fila- 

 ment occurs in the track of the 

 needle, and gas bubbles in isolated 

 colonies in its lower part, and a 

 transparent patch with irregular 

 margin on the free surface. 



On the surface of agar they pro- 

 duce a greyish- white layer. 



In broth there is turbidity with 

 I flocculi. 



On potato the growth is yellowish 

 and viscid. 



They give rise to extensive oedema 

 in guinea-pigvi, and in a less marked 

 ! form in rabbits. 



They occur in earth. 



Bacillus oedematis maligni 

 ! (p. 2-20). 



Bacillus of Belfanti and Pas- 

 car Ola. Very short rods. 



Colonies circular, granular, yel- 

 i lowish-grey. 



Inoculated in the depth of gela- 

 tine they produce a filament com- 

 ; posed of closely-packed minute 



