<prompt> TRUE about mycobacterium other than tuberculosis?Causes disseminated infectionOccurs in persons with normal immunityCauses decreased efficacy of BCG due to cross immunityPerson to person transmission is seen  <response>: Mycobacterium other than mammalian tubercle bacilli which cause human disease is called atypical, anonymous, unclassified, environmental, oppounistic. They have also been called para tubercle, tuberculoid, MOTT. They are of 4 groups: photochromogens, scotochromogens, non photochromogens, rapid growers. Widely distributed in the environment and are paicularly abundant in wet soil, marshland, streams, rivers and estuaries. Human beings are therefore regularly exposed to mycobacteria as a result of drinking, washing, showering and inhalation of natural aerosols. Ref: Ananthanarayanan panikers textbook of microbiology Ed 8th Page 359. 