Which of the following is the most useful to differentiate micrococci from Staphylococci-
Catalase test
Hugh Leifson test
Oxidase test
All of the above
Ans. is 'b' i.e., Hugh Leifson test . The common laboratory test to differentiate between micrococci and Staphylococci is Hugh and Leifson's oxidation fermentation test in which micrococci show oxidative and Staphylococci show fermentative patterns.