TYPHOID GROUP -CoNTiNiiED. ^39 



Bacillus dysenteriae Shiga. 

 Synonym. Bacillus of Japanese dysentery Shiga. 



ExPLANATOEY. First described by Shiga, who found it causally 

 related to a dysentery epidemic ; Flexner has more recently found it 

 in the Philippines and elsewhere. 



Eefeebnces. Shiga, C. f . B., 1898, 23 ; 599 and 24 : 817, 870 and 

 913 ; Bldridge, Public Health Repts., 1900, 15 ; p. 1, Flexner, Phil. 

 Med. Jour. 1900, Sept. 1 ; A. 440 ; C. 228. K. & W. II, 317 ; M. & R. 

 350 ; McF. 519. 



MORPHOLOaiCAL CHARACTEES : 



Sketches. 



1. FoKM AND arrangement: 

 a. Bouillon 



6. Agar . 



t. Gelatin. 



d. Other media.. 



Size: 



Staining powers : 



a. Aqueous gentian- violet.. 



b. LoelHer's methylen-blue. 



0. Grain's stain 



d. Special stains 



Motility: 



u. Character of movement... 

 6. Flagella stain 



5. Spoess:. 



Special chaeaotees: — 



u,. Capsules 



l>. Involution f or.ms 



c. Deposits or vacuoles.. 



d. Pleomorphism 



