Which of the following is not a bactericidal antibiotics?

Options

A. penicillin
B. ofloxacin
C. aminoglycosides
D. tetracycline

Answer

To determine which of the following is not a bactericidal antibiotic, we need to understand the classifications of antibiotics. Antibiotics can be broadly categorized into two types: bactericidal and bacteriostatic.

1. **Understanding Bactericidal vs. Bacteriostatic:**
- **Bactericidal Antibiotics:** These antibiotics kill bacteria directly.
- **Bacteriostatic Antibiotics:** These antibiotics inhibit the growth and reproduction of bacteria but do not kill them.

2. **Identifying Examples of Bactericidal Antibiotics:**
- Common examples of bactericidal antibiotics include:
- **Penicillin**
- **Ophloxacin**
- **Aminoglycosides**

3. **Identifying Examples of Bacteriostatic Antibiotics:**
- An example of a bacteriostatic antibiotic is:
- **Tetracycline**

4. **Analyzing the Options:**
- **Option 1: Penicillin** - This is a bactericidal antibiotic.
- **Option 2: Ophloxacin** - This is also a bactericidal antibiotic.
- **Option 3: Aminoglycoside** - This is another bactericidal antibiotic.
- **Option 4: Tetracycline** - This is a bacteriostatic antibiotic.

5. **Conclusion:**
- Since Tetracycline is the only antibiotic listed that does not kill bacteria but rather inhibits their growth, the correct answer to the question "Which of the following is not a bactericidal antibiotic?" is **Option 4: Tetracycline**.