304 BACTERIOLOGY 



269. B. Taveli 



Pseudotetanusbacillus Tavel : Centralblatt f. Bakteriol., XXIII, 1898, 538. 



Morphology. Bacilli slender, 0.5 : 5-7 /x, rather more slender than B. telanL 

 Spores of the above oval those of B. tetani round. Flagella peritrichic, 

 ordinarily 4-8 /x. Stained slightly by Gram's method. Gelatin cultures 

 not successful. 



Agar stab. Much gas. 



Bouillon. Turbid, a white light gray sediment, becoming clear. 



Agar slant. Round discrete colonies, with thin borders, not always entire, 

 but often jagged. 



Fluid blood serum. Cultures develop only in a vacuum (with the least trace 

 of oxygen no growth). A strong turbidity, gas, and a bad odor. 



Pathogenesis . Non-pathogenic to mice, guinea pigs, and rabbits. 



Habitat. Isolated from cases of abscess of the intestines. 



CLASS XXIII. I'vVlTHOUTj ENDOSPORES. CHROMOGENIC, PRODUCE 

 ' PIGMENT ON GELATIN OR AGAR. 



I. Aerobic and facultative anaerobic. 



A. Pigment reddish-pink on gelatin ; gelatin liquefied. 



1. Rods not swollen at sporulation. B. subtilis type. 



270. B. Lustigi. 



271. B. apicum Kruse. 



2. Rods at sporulation of the tetanus type. 



272. B. Danteci Kruse. 



B. Pigment blue-violet. 



273. B. Berolinensis Kruse. 



274. B. Lutetiensis Kruse. 



C. Pigment brown black ; gelatin liquefied. 



275. B. niger Biel. 



270. B. Lustigi 



Der rather Bacillus Lustig : Diag. Bak. des Wassers, 1893, 72. 



Morphology. Bacilli small, with rounded ends, generally 2-3 times their 

 breadth, variable, very motile, filaments also motile. 



Gelatin colonies. Gray dots with red centres ; microscopically, round, granu- 

 lar, edges serrate, centres raspberry-red, becoming liquefied. 



