This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Misc., Subject name: Microbiology
Staphylococcal epidermis all are true EXCEPT 
Select and explain. 
A. Sensitive to penicillin, B. Makes slimy layer, C. Coagulase negative, D. Coagulase Positive
D: Coagulase Positive
Answer: D: Coagulase Positive 
Explanation: (D) Coagulase Positive # Staphylococcus epidermidis is a coagulase negative species of staphylococcus.> Staphylococcus epidermidis is invariably present on normal human skin.> It is nonpathogenic ordinarily but can cause disease when the host defences are breached. It is a common cause of stitch abscesses.> It has a predilection for growth on implanted foreign bodies such as artificial heart valves, shunts, intravascular catheters and prosthetic appliances, leading to bacteremia.> Hospital strains of Staphylococcus epidermidis are usually multiple drug resistant.> Endocarditis may be caused,particularly in drug addicts.