Hello awesomites let's see today how can we differentiate Staphylococci and Streptococci.
Suppose now in a Laboratory sample we find a gram positive cocci bacteria .Now clinically the given sample can either be Staphylococci or Streptococci.
We can simply rule out streptococci by using catalase test as only Staphylococci are catalase positive and further type of Streptococci can be differentiated by there type of hemolysis .
How to differentiate between Staphylococcus aureus and other species of Staphylococcus?
Well Staphylococcus aureus is coagulase positive and other species are coagulase negative.
We can also use phosphate test
S.Aureus is phosphatase positive and others are negative.
How is S.saprophyticus differentiated from S.Epidermidis and hemolyticus.?
All three above mentioned species are Coagulase negative .So S.saprophyticus can be differentiated from others by Novobiocin test.