BACILLI 443 



' WEISSEE BACILLUS V (Tataroff) 



Authority. Tataroff, Die Dorpater Wasserbacterien, Dorpat, 1891, p. 35. 



Where Found. In well-water from Dorpat. This bacillus differs from 

 Bacillus albus inasmuch as it has rounded ends and is not motile. It re- 

 sembles in nearly all respects (Tataroff, loc. cit., p. 37) the Bacillus candicans 

 obtained from soil and described by Percy and G. C. Frankland, Zeitschrift 

 fiir Hygiene, vol. vi. p. 397. 



Microscopic Appearance. Slender double bacillus, nearly 1-5 ju. long, with 

 rounded ends. In stained preparations the small bacilli look short and oval. 

 In broth threads are formed. It is not motile. 



Cultures. 



GELATINE PLATES. White pin-head colonies, resembling bit.s of shining 

 porcelain. Under a low power the depth colonies are either round or oval, 

 faintly brown in colour, and with granular contents. The surface colonies are 

 brown white with a touch of yellow, shining, circular, with sharp contour, 

 although occasionally deep indentations are seen. No liquefaction takes place. 



GELATINE TUBES. Produces a shining somewhat thick porcelain-white 

 expansion. Later the colour becomes grey white, and the gelatine is cleft by 

 bubbles of gas. In the depth it produces a sword-like streak. 



AGAR-AGAR. Shining, milk-white, moist and shiny expansion, and a v.hite 

 deposit collects in the condensed water. 



GLYCERINE-AGAR. Luxuriant and shining white growth covering the whole 

 surface. Later it becomes greyish, and finally of a dirty white colour tinged 

 with yellow. 



BLOOD SERUM. White slimy and moist expansion. 



BROTH. Kenders it very turbid, producing a considerable amount of 

 brownish white deposit. 



POTATOES. Forms a moist, shining, brown white expansion which does not 

 extend very far from the point of inoculation. 



BACILLUS ALBUS (< Weisser Bacillus ') 



Authority. Eisenberg, Bakteriologische Diagnostik, 1891, p. 171. 



Where Found. In water. This is doubtless the same organism as that 

 found in water and described as ' Der weisse Bacillus ' by Maschek (see p. 480). 



Microscopic Appearance. Short bacillus with blunted ends ; often several 

 are seen joining on end to end. It is motile. 



Cultures. 



GELATINE PLATES. Bound white pin-head colonies. No liquefaction of the 

 gelatine takes place. 



GELATINE TUBES. Grows slowly, producing a whitish streak in the depth 

 and forming a white pin -head on the surface as on the plates. 



AGAR-AGAR. Produces a milk-white expansion. 



POTATOES. Forms a dirty yellow white growth restricted to the point of 

 inoculation. 



Remarks, It will not grow at higher temperatures. 



