Thayer Martin is a selective medium for
**Core Concept**
The **Thayer Martin medium** is used in microbiology for the isolation of a specific type of bacteria. It is a selective medium, meaning it allows the growth of certain bacteria while inhibiting others. This is crucial for identifying pathogens in clinical samples.
**Why the Correct Answer is Right**
Thayer Martin medium is specifically designed for the isolation of **Neisseria** species, particularly *Neisseria gonorrhoeae*, the causative agent of gonorrhea. The medium contains antibiotics that inhibit the growth of most other bacteria and fungi, allowing *Neisseria* species to be isolated from clinical specimens.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not related to the specific use of Thayer Martin medium.
**Option B:** Incorrect as it does not specify the correct organism.
**Option D:** Incorrect because, although it mentions a type of bacteria, it is not the specific target of Thayer Martin medium.
**Clinical Pearl / High-Yield Fact**
Remember, Thayer Martin medium is used for culturing *Neisseria gonorrhoeae*, a common cause of sexually transmitted infections. Its selective properties make it ideal for diagnosing gonorrhea from genital swabs.
**Correct Answer:** D. Neisseria gonorrhoeae