A case is reported of a bilateral atypical mycobacterial infection, occurring in a 44 year old male with antecedent silicosis. Successful surgical resection was performed after 17 months of failed chemotherapy. The atypical mycobacterium which is unclassified is intermediate between Mycobacterium avium-intracellulare. Mycobacterium terrae complex and Mycobacterium gastri. It has some similarities with the newly described species, Mycobacterium malmöense.
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