<prompt> Most common cause of infection caused by intravascular catheter ?E coliCoagulase negative staphylococciStaph aureusPseudomonas  <response>: 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. 