430 MICRO-ORGANISMS IN WATER 



BACILLUS CAPSOLATUS 



Authority. Rintaro Mori, ' Ueber pathogene Bacterien im Canalwasser,' 

 Zeitschriftfiir Hygiene, vol. iv., 1888, p. 52. 



Where Found. In Berlin drain -water. Resembles the B. pnctLinoniac of 

 Friedlander. 



Microscopic Appearance. Bacillus exhibiting elliptical and rod-like forms 

 0*9 to 1*6 fj. in size. Occurs very frequently, and in the bodies of animals exclusively, 

 surrounded by a capsule about 4-5 /j. long and 2-5 i*. broad. Sometimes two are 

 found joined end to end enclosed by one capsule. It is not motile. It is not 

 stained by Gram's method. 



Cultures. 



GELATINE PLATES. At room-temperature in twenty-four hours it forms 

 porcelain-white shining pin-head colonies. 



GELATINE TUBES. It grows freely in the depth the whole length of the 

 needle's path, forming on the surface a growth resembling the head of a nail. 

 No liquefaction takes place. 



AGAK-A.GAK. Grows as on gelatine, but more favourably at a higher tem- 

 perature of from 36 to 37 C. The growth is stringy. 



BROTH. Produces a white turbidity, and after from three to four days a white 

 pellicle forms on the surface, and more especially at the sides of the tube. 



POTATOES. Grows luxuriantly at 37 C., forming a yellowish moist stringy 

 growth with slightly irregular edge. An abundant quantity of gas bubbles is 

 produced. 



Eemarks. Is pathogenic to mice, and, when injected into the pleural cavity, to 

 rabbits. 



