This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Microbiology
Most common catheter-related bloodstream infection is 
Select and explain. 
A. Candida, B. Gram negative organisms, C. Coagulase positive staphylococci, D. Coagulase negative staphylococci
D: Coagulase negative staphylococci
Answer: D: Coagulase negative staphylococci 
Explanation: S.saprophyticus, a coagulase-negative staphylococcus, may be present on the periurethral area and can cause UTI. Ref: Ananthanarayan& Paniker&;s textbook of microbiology, 9th edition. Pg no.206