Antibiotics are used to treat diseases like-

Options

A. Plague
B. Whooping cough, Diphtheria
C. leprosy
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Antibiotics**: Antibiotics are substances that kill or inhibit the growth of bacteria. They are primarily used to treat bacterial infections, not viral infections.

2. **Identifying Diseases Treated by Antibiotics**:
- **Plague**: This is a bacterial infection caused by *Yersinia pestis*. Antibiotics are effective in treating this disease.
- **Leprosy**: Also known as Hansen's disease, it is caused by the bacterium *Mycobacterium leprae*. Antibiotics, particularly multi-drug therapy (MDT), are used for its treatment.
- **Diphtheria**: This is caused by *Corynebacterium diphtheriae* and can be treated with antibiotics.
- **Typhoid Fever**: Caused by *Salmonella typhi*, this disease is also treated with antibiotics.

3. **Conclusion**: Antibiotics are used to treat diseases such as plague, leprosy, diphtheria, and typhoid fever.

4. **Examples of Antibiotics**: Common antibiotics include penicillin, tetracycline, and streptomycin, which are used to treat various bacterial infections.

5. **Vaccination**: While antibiotics treat bacterial infections, vaccinations (like BCG for tuberculosis and DTP for diphtheria, tetanus, and pertussis) are preventive measures against certain bacterial diseases.

**Final Answer**: Antibiotics are used to treat diseases like plague, leprosy, diphtheria, and typhoid fever.

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