160 A MANUAL OF BACTERIOLOGY 



in putrefying albuminous fluids, potable water, etc. 

 It occurs singly and as leptothrix. On gelatine- 

 plates, white colonies are formed. The outer zones 

 of these colonies are of a yellowish-green colour. 

 On potatoes, this microbe forms brown patches which 

 do not spread. It produces dirty-red spores. 



Bacillus cedematis maligni. This microbe, ob- 

 tained from soil, is a pathogenic microbe. Mice, 

 rats, cats, etc., inoculated with a pure cultivation of 

 this bacillus, die in a few hours. It measures from 

 3 to 5 fji x 1 //,, and has rounded ends. It occurs 

 singly, in chains, and leptothrix (straight or curved) ; 

 spores are formed ; and the microbe is anaerobic. 

 It grows well on the surface of a neutral solution of 

 Liebig's extract of meat at 36 to 38 C., or in 

 nutrient agar-agar ; but air must be excluded from 

 the cultivation tubes or flasks. 1 For some recent 

 work concerning the microbe of malignant cedema, 

 see Dr. Klein's paper in Centralblatt fur Balderiologie 

 iind ParasitenJcunde, Band x. (1891), p. 186. 



Bacillus of rhinoscleroma. A microbe found in 

 the tissues of patients suffering from rhinoscleroma 

 a disease which gives rises to tumours on the 

 lips, and nasal and pharyngo-laryngeal regions. 

 The bacillus measures from 1*5 to 3 //, x 0*5 to 0'8 

 //, ; it has rounded ends, produces spores, and sur- 

 rounds itself with an elongated capsule (Fig. 33, 11). 

 This microbe is readily stained with a solution of 

 methyl violet. 



Bacillus of Indigo Fermentation. This microbe is 

 morphologically similar to the bacillus of rhino- 



1 See Dr. Griffiths' Researches on Micro- Organisms, p. 235. 



