<prompt> Most common catheter-related bloodstream infection is -CandidaGram negative organismsCoagulase positive staphylococciCoagulase negative staphylococci  <response>: 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 bloodstream infection coagulase-negative staphylococci2nd MC cause of catheter-related bloodstream infection coagulase-positive staphylococci S. aureus 