Rapid growing non-tuberculous mycobacteria causing lung infection are all except:

Ans. (a) M. Kansasii As mentioned above M Kansasii is not a rapid grower Rapid Growing Mycobacteria Heterogeneous group to mycobacteria capable of rapid growth, colonies appearing within seven days of incubation. Impoant members include: M. phlei : Saprophyte M. fouitum : Chronic abscess, pulmonary lesions M. chelonae : Chronic abscess M. smegmatis : Round in smegma M. vaccae : Immunomodulator that stimulates protectine immune response in tuberculosis M. abscessus : Oesophageal motility disorders such as achlasia