An antibiotic that acts on a variety of pathogenic organisms is called

Options

A. broad spectrum antibiotic
B. narrow spectrum antibiotic
C. Gram positive antibiotic
D. Gram negative antibiotic

Answer

To answer the question about what an antibiotic that acts on a variety of pathogenic organisms is called, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Antibiotics**:
- Antibiotics can be classified based on their spectrum of activity. The two main categories are broad spectrum and narrow spectrum antibiotics.

2. **Define Broad Spectrum Antibiotics**:
- Broad spectrum antibiotics are those that are effective against a wide range of bacteria, including both Gram-positive and Gram-negative bacteria. They are used to treat infections caused by multiple types of bacteria.

3. **Define Narrow Spectrum Antibiotics**:
- Narrow spectrum antibiotics, on the other hand, are effective against specific types of bacteria. They target either Gram-positive or Gram-negative bacteria but not both.

4. **Consider the Options Given**:
- The options provided in the question are:
- Broad spectrum antibiotic
- Narrow spectrum antibiotic
- Gram positive antibiotic
- Gram negative antibiotic

5. **Identify the Correct Answer**:
- Since the question specifically asks for an antibiotic that acts on a variety of pathogenic organisms, the correct answer is **broad spectrum antibiotic**.

### Final Answer:
An antibiotic that acts on a variety of pathogenic organisms is called a **broad spectrum antibiotic**.

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