84 LABORATORY BACTERIOLOGY 



EXERCISE XXXII 



BACILLI OF DYSENTERY 



124. A number of bacilli have been isolated from the intes- 

 tine from cases of dysentery. The first of these organisms 

 seems to have been described by Shiga, who isolated it from 

 cases of dysentery in India. Since his work was published a 

 number of bacilli very closely related to the one he described, 

 if not identical with it, have been found in this country. In 

 this exercise one or more of these organisms will be studied. 



References. Shiga, Centralblatt F. Bakt., Vol. XXIII, p. 599, 

 Deutsche Med. Wochensch., Vol. XXVII, p. 741. Kruse, Ibid., 

 p. 370. Duval and Bassett, Am. Med., Vol. IV, p. 417. Gay, 

 Univ. Penn. Med. Bulletin, Vol. XV, p. 307. Duval and Gay, 

 Ibid., Vol. XVI, 1903, p. 177. Flexner, Ibid., Vol. XIV, p. 190. 

 Park and Carey, Jour. Med. Research, Vol. IX, 1903, p. 180. 



125. Work for this exercise. Study and carefully describe 

 the cultures of dysentery bacteria made in the last exercise. 



Examine the bacteria in the hanging-drop and in stained 

 cover-glass preparations from the bouillon and gelatin cultures. 

 Describe the morphology and make a drawing of a few bacilli, 

 giving their size by actual measurement. 



Compare carefully the cultural characters of this organism 

 with those of hog-cholera, typhoid, and colon bacilli. 



