This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
The term ble but not cultivable is used for - 
Select and explain. 
A. M. leprae, B. M. tuberclosis, C. Treponema pallidum, D. Salmonella
A: M. leprae
Answer: A: M. leprae 
Explanation: It has not been possible to culture Mycobacterium leprae in vitro so far. Can be grown in the footpad of the mouse. It is a long and strenuous process and therefore considered noncultivable REF:Textbook of Microbiology, Ananthanarayan, and Paniker. Page no.: 346, 364