BACILLI RESEMBLING TYPHOID BACILLUS 415 



BACILLUS AQUATILIS 8ULCATUS V. 



Authority. — Weichselbaum, Das osterreichische Sanitatswesen, 1889, 

 Nos. 14 to 23. 



"Where Found. — In Vienna ' Hochquellenleitungswasser ' at the time when 

 the water from the river Schwarza was introduced. 



Microscopic Appearance. — The individual bacilli vary in size, are somewhat 

 thicker than the typhoid bacillus, and have rounded and also pointed ends. 

 It is motile. No spore formation observed. It is not coloured by Gram's 

 method. 



Cultures.— 



Gelatine Plates. — Resembles B. aqiiatilis sulcatus I. 



Gelatine Tubes. — A somewhat thin grey white expansion appears after two 

 days, which increases in size, and becomes later of an egg-yolk yellow colour. 

 The gelatine is not liquefied. 



Agar-agar. — It will only grow at room-temperature, when it exhibits an 

 abundant yellow viscid growth. 



Broth. — Grows at room-temperature, producing a white deposit. 



Potatoes. — Produces at room-temperature a pale yellow growth, whilst in 

 the vicinity the p.otato becomes a dark grey colour. The latter disappears later, 

 and the growth becomes honey- coloured. 



