TYPHOID GROUP— CoKTiNOTD. 343 



Bacillus pestis (Lehm. & Neum.) Chestbe. 



Synonyms. Bacterium pestis Lehm. & Neum. ; Bacillus pestis- 

 bubonic8B Kruse ; Bacillus of bubonic plague. 



Explanatory. Described at about the same time independently 

 by Kitasato and Yersin in 1894. Found in the buboes, and occa- 

 sionally in the feces, urine and blood and, in the pneumonic form, 

 in the sputum. 



References. Kitasato, Lancet, 1894, 2, 428 ; Yersin, Ann. Inst. 

 Past., 1894, 8, 662 ; A. 310 ; C. 215 ; H. 291 ; K. & W. II, 475 ; M. & R. 

 435 ; L. & N. 213 ; Mig. 2, 749 ; McF. 559 ; P. 606. 



Morphological characters : 



Sketches, 



1. Form and arrangement: 

 a. Bouillon 



6. Agar . 



u. Gelatin. 



a. Other media.. 



2. Size: 



3. Stainino powers : 



a. Aqueous gentian- violet. . 

 b Loeffler's methylen-blue. 



c. Gram's stain 



(1. Special stains 



4. Motility: 



a. Character of movement.., 

 6. Plagella stain 



5. Spores:. 



Special characters:. .. 



II. Capsules 



b. Involution forms 



V. Deposits or vacuoles.. 

 d. Pleomorphism 



