A Gram-Negative Diplococcus Grew on 5% Sheep Blood Agar and Chocolate

Multiple Choice

A gram-negative diplococcus grew on 5% sheep blood agar and chocolate agar,had scant growth on MacConkey agar,and had no growth on modified Thayer-Martin (MTM) agar.The organism was identified as N.sicca.Which one of the following statements explains the discrepancy of the results obtained on the MTM agar?

A) The medium was most likely expired.
B) The organism was most likely incorrectly transported.
C) The organism was most likely incubated at 35°C instead of 25°C.
D) No discrepancy is present.N.sicca does not grow on MTM agar.