Abstract
Although ubiquitous environmental organisms, nontuberculous mycobacteria can cause opportunistic infections in humans, especially the species belonging to M. chelonae-M. abscessus group. Until recently, this group was composed of M. chelonae, M. abscessus, M. immunogenum M. bolletii, M. massiliense and M. salmoniphilum. Taxonomic changes in this group have been proposed including the unif…