rapid growing mycobacterium rapid growing mycobacterium rapid growing mycobacterium consists of organism of the mycobacterium fortuitum group and mycobacterium chelonae/mycobacterium abscessus group and these usually cause subcutaneous abscesses or cellulitis following trauma in immunocompetent patients.: 340 list of rapidly growing mycobacteria mycobacterium fortuitum mycobacterium chelonae mycobacterium smegmatis mycobacterium abscessus mycobacterium mucogenicum mycobacterium peregrinum nonchromogenic mycobacterium abscessus mycobacterium agri mycobacterium alvei mycobacterium arupense mycobacterium fortuitum chromogenic scotochromogenic yellow-orange •mycobacterium aichiense photochromogenic •mycobacterium novocastrense (sp.nova)