This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
Dorset egg medium is used for cultivation of 
Select and explain. 
A. Staphylococcus, B. Streptococcus, C. Gonococcus, D. M TB
D: M TB
Answer: D: M TB 
Explanation: Media which are used for the cultivation of Mycobacterium tuberculosis are LJ media which is most common media used in which growth is seen in 6 to 8 weeks and the colonies are Rough, Buff and tough. The other media used car door fitting media Petragnini media, Saula media, Dubois media or Middlebrook's media. Note-Extra edge M . tuberculosis M. bovis Rough , buff and tough colonies on LJ media Flat , moist and smooth colonies on LJ media Aerobic Microaerophile Shows glycerol and niacin enhancement No such enhancement