Microbe used in cheese preparation is

Options

A. Acetobacter aceti
B. Penicillium notatum
C. Clostridium butylicum
D. Propinibacterium sharmanii

Answer

**Step-by-Step Solution:**

1. **Understanding Cheese Preparation**: The process of cheese making involves several steps, starting with the curdling of milk. This is essential for cheese production.

2. **Curdling of Milk**: The first step in cheese preparation is the curdling of milk, which is primarily facilitated by the action of lactic acid bacteria (LAB), specifically Lactobacillus. This bacteria helps in changing the pH of the milk, leading to curd formation.

3. **Coagulation**: After curdling, the next step is coagulation. In this step, an enzyme called renin is added to the curd mixture to solidify the curd more effectively.

4. **Separation of Curd and Whey**: Once coagulation occurs, the curd is separated from whey, which is the liquid part of the curd. This separation is crucial for the subsequent steps in cheese making.

5. **Processing the Curd**: The curd is then processed to remove moisture. If the moisture is drained out completely, it results in soft cheese. If the soft cheese is compressed, it leads to the formation of hard cheese.

6. **Salting and Ripening**: The next step involves salting the cheese, which not only enhances flavor but also acts as a preservative. During ripening, various microbes are introduced to develop different flavors in the cheese.

7. **Identifying the Microbes**: The question specifically asks about the microbe used in cheese preparation. One of the key microbes involved in the production of certain types of cheese, such as Emmental cheese, is Propionibacterium shermani. This bacterium is responsible for the characteristic holes in Swiss cheese due to the production of carbon dioxide during fermentation.

8. **Conclusion**: Therefore, the microbe used in cheese preparation, particularly for Swiss-type cheeses, is Propionibacterium shermani.

**Final Answer**: The microbe used in cheese preparation is **Propionibacterium shermani**.

---