Which of the following biochemical test is ideal for identification of Neisseria gonorrhea?
**Core Concept**
The identification of Neisseria gonorrhea, a sexually transmitted bacterium, relies on biochemical tests that distinguish it from other Neisseria species. These tests often involve the use of selective media and biochemical characteristics that are unique to N. gonorrhea.
**Why the Correct Answer is Right**
The ideal biochemical test for identifying N. gonorrhea is the **Thayer-Martin agar**, which is a selective medium that inhibits the growth of most other bacteria. However, the definitive test is the **Chromogenic test**, which detects the enzyme **β-glucuronidase** produced by N. gonorrhea. This enzyme breaks down chromogenic substrates, resulting in a characteristic color change. The β-glucuronidase test is highly specific for N. gonorrhea and is used in conjunction with other tests to confirm identification.
**Why Each Wrong Option is Incorrect**
* **Option A:** The Gram stain is a useful preliminary test for identifying bacteria but is not specific for N. gonorrhea.
* **Option B:** The Wright stain is a type of differential stain used to identify blood cells but is not relevant to the identification of N. gonorrhea.
* **Option D:** The CAMP test is used to identify Group B streptococci, not N. gonorrhea.
**Clinical Pearl / High-Yield Fact**
When suspecting N. gonorrhea, it's essential to consider the patient's clinical presentation, risk factors, and laboratory results. A high index of suspicion and prompt treatment are crucial to prevent complications and transmission.
**Correct Answer:** C. Chromogenic test