Which of the following media is differential but not selective?
A) Chocolate agar
B) MacConkey agar
C) Thayer-Martin agar
D) None of the above
E) A and C
Question 2
Commercial identification systems may have problems with the identification of non-fermenting gram-negative rods because
A) their biochemical reactions tend to be weak.
B) B and C.
C) they are not frequently isolated.
D) A and B.
E) some of these organisms are slow growing.
