<prompt> Difference between staphylococcus aureus and staphylococcus saprophyticus -Catalase positivityCoagulase positivityNovobiocin susceptibilityOxidase positivity  <response>: Ans. is b i.e., Coagulase positivity Coagulase test used to differentiate betweeni Coagulase positive staphylococci - Staph aureusii Coagulase negative staphylococci - Staph epidermidis, staph hemolyticus, staph saprophyticus. Novobiocin sensitivity is used to differentiate coagulase negative staphylococci:i Novobiocin susceptible : Staph epidermidis, staph hemolyticusii Novobiocin resistant: Staph saprophyticus Coagulase test is used to differentiate the different species of staphylococci staph aureus, staph, epidermidis. Catalase test is used to differentiate staphylococci from streptococci. 