100 BACTERIOLOGICAL ANALYSIS LESSON iv 



(10) Subsequently select those cultures which apparently 

 consist of typhoid bacilli or the Bacterium coli commune, 

 and confirm the diagnosis by 



(a) microscopical examination; 

 (6) milk cultures (at 38 -5 C.) ; 

 (c) growth on potatoes (at 38*5 0.) 



For differences between the bacillus of typhoid fever 

 and the Bacterium coli commune vide p. 53. 



