Which of the following antibiotics is used in the treatment of typhoid?

Options

A. Terramycin
B. Penicillin
C. Chloramphenicol
D. Erythromycin

Answer

To determine which antibiotic is used in the treatment of typhoid, we can analyze the options provided:

1. **Teramysine**: This antibiotic is primarily used for urinary tract infections and eye infections. It is not effective against typhoid fever.

2. **Penicillin**: This antibiotic is commonly used to treat various bacterial infections, but it is not the first choice for treating typhoid fever. It is more effective against pneumonia and other infections.

3. **Erythromycin**: This antibiotic is generally used for respiratory infections and is not specifically indicated for typhoid fever.

4. **Chloramphenicol**: This is the antibiotic that is specifically known for treating typhoid fever, as it is effective against the bacteria Salmonella typhi, which causes the disease.

Based on the analysis, the correct answer is **Chloramphenicol**.

### Step-by-Step Solution:
1. **Identify the disease**: Recognize that typhoid is caused by the bacteria Salmonella typhi.
2. **Evaluate the antibiotics**: Go through the options provided and assess their effectiveness against Salmonella typhi.
3. **Eliminate incorrect options**:
- Teramysine is not used for typhoid.
- Penicillin is not the first choice for typhoid treatment.
- Erythromycin is not specifically used for typhoid.
4. **Identify the correct antibiotic**: Recognize that Chloramphenicol is the antibiotic that is specifically effective against Salmonella typhi and is used in the treatment of typhoid.