AIDS can be diagnosed by -

Options

A. radio immuno assay(RIA)
B. enzyme linked immuno -sorbent assay (ELISA)
C. western blotting (confirm test)
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding AIDS Diagnosis**: AIDS (Acquired Immunodeficiency Syndrome) is diagnosed through specific tests that detect the presence of the HIV virus or the antibodies produced in response to it.

2. **Identifying Common Tests**: The two primary tests used for diagnosing AIDS are:
- **ELISA (Enzyme-Linked Immunosorbent Assay)**: This test is commonly used as a screening method for HIV antibodies in the blood.
- **Western Blot Test**: This is a confirmatory test used to verify the results of the ELISA test.

3. **ELISA Test**: The ELISA test is the first step in diagnosing AIDS. If the ELISA test is positive, it indicates that the person may be infected with HIV.

4. **Confirmatory Testing**: If the ELISA test result is positive, a Western Blot test is performed to confirm the diagnosis. This test is more specific and helps to rule out false positives.

5. **Conclusion**: Therefore, AIDS can be diagnosed primarily through the ELISA test, and the Western Blot test serves as a confirmatory test.

**Final Answer**: AIDS can be diagnosed by the ELISA test, and the Western Blot test is used for confirmation.

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