This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Outbreak of abscess following vaccine injection can be caused by which mycobacteria? 
Select and explain. 
A. M fouitum, B. M. scrofulaceus, C. M Hordinae, D. M Avium
A: M fouitum
Answer: A: M fouitum 
Explanation: 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.