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
Most common cause of infection caused by intravascular catheter ? 
Select and explain. 
A. E coli, B. Coagulase negative staphylococci, C. Staph aureus, D. Pseudomonas
B: Coagulase negative staphylococci
Answer: B: Coagulase negative staphylococci 
Explanation: Ans. is 'b' i.e., Coagulase negative staphylococci "Staph. epidermidis is a coagulase negative staphylococcus, which has predilection for growth on implanted foreign bodies such as intravascular catheters, shunts, aificial hea valves and prosthetic appliances, leading to bacteremia".