MICROCOCCI 505 



MICKOCOCCUS VITICULOSUS 



Authority. Katz and Fliigge, Die Mikroorganismen, 1886, p. 178. 



Where Found. Occasionally in air and water. 



Microscopic Appearance. Oval cocci of variable dimensions, the largest 

 being about 1*2 /j. in diameter, and the smaller ones 1 /u. Forms closely-packed 

 masses of zooglo3a. 



Cultures. 



GELATINE PLATES. The depth colonies exhibit fine hairy ramifications, which 

 extend from the centre of the colony to some distance into the surrounding 

 gelatine and form a very fine and delicate network. Under a low power these 

 ramifications are seen to consist of zoogloea masses of various dimensions and of 

 irregular contour, arranged side by side. The surface colonies form a thin 

 cloud-like expansion, opaque and whitish, from which fine threads penetrate 

 into the depth of the gelatine. No liquefaction ensues. 



GELATINE TUBES. A delicate network appears in the depth, which soon be- 

 comes covered up by the more rapidly growing surface expansion. Along the 

 path of the needle in the depth radial extensions resembling a feather make 

 their appearance. 



POTATOES. Forms a dirty white dry expansion, which grows quickly. 



SAECINA ALBA 



| LIQUEFIES GELATINE | 



Where Found. In air and water. / 



Microscopic Appearance. Small cocci arranged in twos or fours. 



Cultures. 



GELATINE PLATES. Grows slowly, giving rise to small round white colonies. 

 Slight liquefaction slowly ensues. 



GELATINE TUBES. Grows only slightly in the depth, but produces a white 

 raised circular growth on the surface. 



POTATOES. Grows very slowly, producing a whitish yellow expansion, 

 restricted to the point of inoculation. 



SAECINA CANDIDA (Keinke) 



LIQUEFIES GELATINE 



Authority. Lindner, Die Sarcine-organismen der Garungsgewerbe, Berlin, 

 1888. 



Where Found. In a water reservoir supplying a brewery ; also in air in 

 the vicinity of breweries. 



Microscopic Appearance. Occurs as cocci, or diplococci and tetrads. The 

 individual cells have a diameter of 1-5 to 1-7 p. They are only arranged in the 

 three dimensions of space, in particular culture media (decoction of hay). 



Cultures. 



GELATINE PLATES.-r-Forms shining white colonies surrounded by a circle of 

 liquid gelatine. Later they become yellowish in colour. 



GELATINE TUBES. Resembles the growth of the Pediococcus albus (see 

 p. 494). 



AGAE-AGAE. Forms a white, moist, shining expansion with a smooth rim. 

 No pellicle forms on the condensed water. 



