356 BACTERIOLOGY 



12. Mycobact. hastilis (Seitz) 



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



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: Bale. Diag., 1896, 363. 



Morphology. Bacilli mostly slender, straight or curved or bent rods, 0.4 : 1 .5-4 /1. 

 Occasionally longer filamentous forms, with true branching, have been 

 noted (Coppen Jones, Centralblatt f. Bakteriol., XVII, 1). 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. H 2 S 

 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 Gefiugeltuberkulose Maffucci : Zeitsch. f. Hygiene, XI, 1892, 445. 

 B. tuberculosis-avium Kruse : Fliigge, Die Mikroorganismen, 1896, 506. 

 Mycobact. tuberculosis-avium Lehmann-Neumann : Bak. Diag., 1896, 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. D. tuberculosis does not 

 grow above 42 . 



