<prompt> Outbreak of abscess following vaccine injection can be caused by which mycobacteria?M fouitumM. scrofulaceusM HordinaeM Avium  <response>: Ans. is a i.e.,M. fouitum Most outbreaks of post-injection abscess have been caused by M fouitum and M abscessus, Injection site abscess is an iatrogenic infection and is a simple out patient procedure to treat.M. chelonae, M. fouitum and M. abscessus are the most impoant rapidly growing mycobacteria associated with such infections. 