356 BACTERIOLOGY 



12. Mycobact. hastilis (Seitz) 



B. hastilis Seitz: Zeitsch. f. Hygiene, XXX, 1899, Heft i. 



Morphology. Bacilli slender or rather broad rods, pointed at one or both- 

 ends, and here and there slightly thickened in the middle ; straight or 

 somewhat bent ; occur singly, in twos or short-long chains. Not stained 

 by Gram's method. With ordinary analine colors, often a beaded stain- 

 ing. No growth on blood serum, but a growth in the water of condensa- 

 tion. Grow in ordinary bouillon with the generation of gas, and a fouL 

 odor like carious teeth. 



Habitat. Isolated from the mouth. 



13. Mycobact. tuberculosis (Koch) 



B. tuberculosis Koch: Die Aetiologie des Tuberculose, Berliner, klin. Wochensch.,, 



1882, No. 15. 

 Mycobact. tuberculosis Lehmann-Neumann : Bak. Diag., 1896, 363. 



Morphology. Bacilli mostly slender, straight or curved or bent rods, 0.4 : i .5-4 /i.. 

 Occasionally longer filamentous forms, with true branching, have beea 

 noted (Coppen Jones, Centralblatt f. Bakteriol., XVII, i). With carbol 

 fuchsin, an irregular, beaded staining. May also show deeply stained- 

 bodies, which Coppen Jones thinks homologous with chlamydospores. 



Glycerin agar slant. Growth whitish, dry, rough — warty, with commonly a. 

 faint pinkish or flesh color. The cultures have a peculiar yeast-like odor. 



Blood serum. Growth white, dry, scaly — granular, which is friable but 

 coherent. 



Potato. An abundant raised growth. 



Glycerin bouillon. A whitish grayish, membranous, rugose growth on the 

 surface, which readily sinks; medium clear. Indol negative. H2S 

 negative. 



Pathogenesis. Subcutaneous inoculation of rabbits and guinea pigs cause a 

 generalized tuberculosis, with death in 2-3 months. 



Habitat. Associated with tuberculosis in man and the lower animals. 



14. Mycobact. avium (Kruse) Lehmann-Neumann 



Bacillus der Huhner oder Gefliigeltuberkulose Maffucci : Zeitsch. f. Hygiene, XI, 1892, 445. 

 B. tub erculosis-av turn Kruse : Flugge, Die Mikroorganismen, 1896, 506. 

 Mycobact. tuberculosls-avium Lehmann-Neumann : Bak. Diag., i8g6, 370. 



Morphology. Bacilli like the preceding, but somewhat longer and more 

 slender, with a greater tendency to form branched and clavate forms. 

 Staining reactions as in No. 13. Grow at 43° C. B. tuberculosis does not 

 grow above 42°. 



