This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology Pa 1 (Gram Positive Cocci, Gram Negative Cocci), Subject name: Microbiology
Staphylococcus differs from streptococcus by - 
Select and explain. 
A. Coagulase test, B. Catalase test, C. Phasphatase, D. Gram negative
B: Catalase test
Answer: B: Catalase test 
Explanation: Catalase test - To detect the presence of enzyme catalase in a bacterium. Not found in anaerobes. To differentiate staphylococci from streptococci. Catalase +ve = Staphylococcus species * Catalase -ve = Streptococcus species