<prompt> Most common catheter related blood stream infection is -CandidaGram negative organismsCoagulase positive staphylococciCoagulase negative staphylococci  <response>: Ans. is d i.e., Coagulase negative staphylococci The most common pathogens isolated from vascular device-associated bacteremia include coagulase negative staphylococci, S. aureus, enterococci, nosocomial gram-negative bacilli and candida. Staph aureus is second only to CoNS as a cause of primary nosocomial bacteremia So: . M.C. cause of catheter related blood stream infection -- coagulase negative staphylococci 2nd MC cause of catheter related blood stream infection coagulase positive staphylococci S. aureus 