<prompt> Catalase test is used to differentiate ?Staphylococcus aureus from staphylococcus epidermidisStaphylococci from streptococciStreptococcus pyogenes from other streptococciNone of the above  <response>: Ans. is b i.e., Staphylococci from streptococci The catalase test is used to differentiate staphylococci catalase-positive from streptococci catalase-negative. The enzyme, catalase, is produced by bacteria that respire using oxygen, and protects them from the toxic by-products of oxygen metabolism 