EXERCISE XCII. BACILLUS PESTIS Kitasato and Yersin. 



BACILLUS OF BUBONIC PLAGUE. 



Described at about the same time independently by Kitasato and Yersin in 1894. Found in the buboes, and occasionally in the faeces, 

 urine and blood and, in the pneumonic form, in the blood. 



EEFERENCES. Kitasato: Lancet, 1894, 3; 428; Yersin: Ann. de 1' Inst. Past., 1894, 8; 663; A. 393; H. 359; L. & K. 300; M. & R. 437; 

 McF. 483; P. 606. 



PHYSIOLOGICAL CHARACTERS. 



i. Relation to temperature : 



2. Relation to free oxygen: 



3. Relation to other agents, such as: 



desiccation, light, disinfectants, etc.: 



4. Figment production: 



5. Gas production in glucose media: 



a. Shake culture 



b. Fermentation tube, growth in: (i) open arm: 



(3) rate of development: 24 hours per cent., 48 hours 



(4) reaction in open arm: 



6. Acid or alkali production, litmus milk 



7 . Reduction of nitrates; to nitrites 



8. Indol production; 24 hours 48 hours 



fecal odor; 24 hours 48 hours 



9. Enzyme production : proteoly tic 



....(2) closed arm: 



per cent., 72 hours percent., hours. 



..(5) gas formula, H : CO 2 : : : 



per cent. 



, to ammonia. 



. days, 

 days. 



. diastatic. 



10. Characteristic odor. 



11. Hathogenesis 



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