A neonate born with Mycobacterium cosmeticum bacteraemia.

Mycobacterium cosmeticum is a rapidly growing mycobacterium that was recently identified. However, its role in human infection has not been well described. We present a case of an extremely premature neonate born with bacteraemia due to M. cosmeticum that resolved without sequelae. The infection likely occurred during a prolonged intrauterine transfusion procedure.