The medium of choice for culturing yeast form of dimorphic fungi is
**Core Concept**
The question is testing the knowledge of culturing dimorphic fungi, specifically the yeast form, which requires a specific medium to grow in vitro. Dimorphic fungi can exist in both yeast and mold forms, and the yeast form is typically cultured using a medium that mimics the body's environment.
**Why the Correct Answer is Right**
The correct medium for culturing yeast form of dimorphic fungi is Sabouraud Dextrose Agar (SDA). SDA is a type of agar medium that contains dextrose as a carbon source, which allows the yeast form of dimorphic fungi to grow and multiply. The dextrose in SDA provides an ideal environment for the yeast form to thrive, as it is rich in carbohydrates, which are an essential nutrient for fungal growth. Additionally, SDA is a solid medium, which allows for easy visualization and isolation of the fungal colonies.
**Why Each Wrong Option is Incorrect**
* **Option A:** Blood agar is a type of agar medium that contains blood as a nutrient source. While it is commonly used for culturing bacteria, it is not suitable for culturing yeast form of dimorphic fungi.
* **Option B:** MacConkey agar is a type of agar medium that is used for culturing gram-negative bacteria. It is not suitable for culturing yeast form of dimorphic fungi.
* **Option C:** Loeffler's serum slope is a type of agar medium that is used for culturing Corynebacterium diphtheriae. It is not suitable for culturing yeast form of dimorphic fungi.
**Clinical Pearl / High-Yield Fact**
Remember that different dimorphic fungi have different growth requirements, and the choice of medium is crucial for successful isolation and identification of the organism.
**Correct Answer: C. Sabouraud Dextrose Agar (SDA)**