This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
Catalase positive coagulase negative beta hemolytic bacteria is 
Select and explain. 
A. Streptococcus pyogenes, B. Staphylococcus aureus, C. Coagulase negative staphylococcus, D. Enterococci
C: Coagulase negative staphylococcus
Answer: C: Coagulase negative staphylococcus 
Explanation: Coagulase negative Staphylococci constitute a major component of the normal flora of human body. eg: S.epidermidis, S.saprophyticus and S.haemolyticus They are negative in: Coagulase Mannitol fermentation Heat stable nuclease Golden yellow pigment Sensitivity to lysostaphin Beta hemolysis on blood agar Phenolphthalein phosphatase Ref: Textbook of Microbiology; Ananthanarayanan and Panicker; Ninth Edition; Page no: 200, 206