Which of the following disease is diagnosed by Australian antigen test

Options

A. AIDS
B. hepatitis B
C. Genital warts
D. Chancroid

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which disease is diagnosed by the Australian antigen test. We need to identify the disease from the provided options: AIDS, hepatitis B, genital warts, and chancroid.

2. **Identifying the Diseases**: All the options listed are sexually transmitted diseases (STDs).
- AIDS is caused by the Human Immunodeficiency Virus (HIV).
- Hepatitis B is caused by the Hepatitis B Virus (HBV).
- Genital warts are caused by the Human Papillomavirus (HPV).
- Chancroid is caused by the bacterium Haemophilus ducreyi.

3. **Understanding the Australian Antigen Test**: The Australian antigen test is specifically used to detect the presence of the Hepatitis B virus (HBV) in the blood. This test identifies the surface antigen of the virus, known as the Hepatitis B surface antigen (HBsAg).

4. **Analyzing the Options**:
- **AIDS**: Diagnosed using different tests, not the Australian antigen test.
- **Hepatitis B**: Diagnosed using the Australian antigen test.
- **Genital warts**: Diagnosed using other methods, not the Australian antigen test.
- **Chancroid**: Diagnosed through culture tests, not the Australian antigen test.

5. **Conclusion**: Based on the information, the disease that is diagnosed by the Australian antigen test is **Hepatitis B**.

**Final Answer**: Hepatitis B (Option B).

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