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
[{'content': 'Most common catheter related blood stream infection is - \nSelect and explain. \nA. Candida, B. Gram negative organisms, C. Coagulase positive staphylococci, D. Coagulase negative staphylococci', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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)', 'role': 'assistant'}]