Mature spherules in sputum sample is seen in which of the following?
**Core Concept**
The question is testing the student's knowledge of **fungal infections**, specifically those that can be diagnosed by examining sputum samples. **Coccidioidomycosis** is a fungal disease caused by **Coccidioides** species.
**Why the Correct Answer is Right**
Mature spherules are a characteristic finding in **Coccidioidomycosis**, containing endospores that are released when the spherule ruptures. This process is crucial for the spread of the infection. The presence of mature spherules in a sputum sample is diagnostic of **Coccidioidomycosis**.
**Why Each Wrong Option is Incorrect**
**Option A:** Incorrect because it is not associated with mature spherules in sputum.
**Option B:** Incorrect as it does not relate to the specific finding of mature spherules.
**Option D:** Incorrect because it is not the correct answer choice for **Coccidioidomycosis**.
**Clinical Pearl / High-Yield Fact**
Remember that **Coccidioidomycosis** is commonly seen in the southwestern United States and can cause severe pulmonary disease. The diagnosis is often made by identifying **spherules** in clinical specimens.
**Correct Answer:** C. Coccidioidomycosis.