A chain of spherical bacteria is called streptococci. When spherical cocci are found in grape like irregular aggregates, they are called

Options

A. staphylococci
B. sarcina
C. palisade
D. streptobacilli

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about the classification of spherical bacteria when they are found in grape-like irregular aggregates.

2. **Identifying the Type of Bacteria:** The term "spherical bacteria" refers to bacteria that have a round shape, known as cocci. When these cocci are arranged in chains, they are referred to as "streptococci."

3. **Recognizing the Arrangement:** The question specifies that the cocci are found in "grape-like irregular aggregates." This description indicates a different arrangement than the linear chains of streptococci.

4. **Identifying the Correct Term:** The arrangement of cocci in clusters that resemble grapes is known as "staphylococci." This term is derived from the Greek word "staphyle," meaning bunch of grapes.

5. **Eliminating Other Options:**
- **Sarcina:** This refers to a specific arrangement of cocci in cubes or packets, not grape-like clusters.
- **Palisade:** This refers to a specific arrangement of rod-shaped bacteria, not cocci.
- **Streptobacilli:** This term refers to rod-shaped bacteria arranged in chains, which is not applicable here.

6. **Conclusion:** Based on the arrangement described in the question, the correct answer is "staphylococci."

**Final Answer:** Staphylococci

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