This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Battey bacillus is 
Select and explain. 
A. Mycobacterium intracellulare, B. Mycobacterium leprae, C. Mycobacterium tuberculosis, D. Mycobacterium kansai
A: Mycobacterium intracellulare
Answer: A: Mycobacterium intracellulare 
Explanation: M.intracellulare: it is commonly known as Battey bacillus because it was first identified as human pathogen at the Battey state hospital for Tuberculosis, Georgia, USA. M.intacellulare and M.avium and are so similar that they can be considered as one group, the M.avium complex (MAC). They cause lymphadenopathy, pulmonary lesions or disseminated disease, paicularly in AIDS patient. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th edition; Pg: 367