Mycobacterium marinum

It is a non tuberculous mycobacteria belonging to the group ‘photochromogens’ and is the causative factor for swimming pool granuloma. It is similar to M.kansasii.

Differentiating features of M.marinum from M.kansasii

  • Poor growth at 37C
  • nitratase negative
  • pyrazinamide hydrolase positive
  • L- fucosidase positive

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