The lab technicians culture the sample on Thayer-Martin agar. This complex medium contains 5% sheep blood and a combination of antibiotics. This medium is
A) differential.
B) selective AND differential.
C) selective.
D) aerobic.
E) chemically defined.

Question

The lab technicians culture the sample on Thayer-Martin agar. This complex medium contains 5% sheep blood and a combination of antibiotics. This medium is 
A) differential.
B) selective AND differential.
C) selective.
D) aerobic.
E) chemically defined.

Quizplus · Accepted Answer

Thayer-Martin agar is selective because it contains antibiotics that inhibit the growth of unwanted bacteria, allowing only the growth of Neisseria species and a few other organisms.

The Lab Technicians Culture the Sample on Thayer-Martin Agar