Author Question: The decarboxylase control tube inoculated with a suspected non-fermenting gram-negative rod is a ... (Read 111 times)

james · **on:** Jun 25, 2018

The decarboxylase control tube inoculated with a suspected non-fermenting gram-negative rod is a turbid dirty gray color after incubation at 35C in ambient air for 24 hours. This result

A) indicates the tube was probably not inoculated.
B) renders all decarboxylase results invalid.
C) is acceptable and the decarboxylase results can be read.
D) should be read at 48 hours not 24 hours.

Question 2

When preparing sheep blood agar, the red blood cells are added

A) once the sterilized agar base begins to gel.
B) immediately after sterilization of the base agar suspension.
C) when the sterilized base agar suspension reaches 55 to 60C.
D) before sterilization of the base agar suspension.