THE PREPARATION OF CERTAIN SPECIAL MEDIA 45 



Group E. Media either necessary for or especially desir- 

 able for the cultivation or differentiation of certain pathogenic 

 bacteria. 



Acid agar (in small tubes). 

 Acid glycerin agar (in small tubes). 

 Acid glycerin bouillon (in small tubes). 



Blood serum (dog) solidified at 70 to 75 C. (ground-glass- 

 capped tubes). 



Loeffler's blood serum (usually small tubes). 

 Egg medium (Dorset). 



