Confirmation test for typhoid is :-

Answer

### Step-by-Step Text Solution:

1. **Understanding Typhoid**: Typhoid fever is an infectious disease caused by the bacterium *Salmonella typhi*. It is important to confirm the presence of this bacterium to diagnose the disease accurately.

2. **Identification of the Test**: The confirmation test for typhoid is known as the Widal test. This test is specifically designed to detect the presence of antibodies against *Salmonella typhi* in the blood of the patient.

3. **Procedure of the Widal Test**:
- **Sample Collection**: Blood is drawn from the suspected typhoid patient.
- **Antibody Detection**: The blood serum is tested for the presence of specific antibodies (agglutinins) that the body produces in response to the infection.
- **Titration Method**: The serum is mixed with known quantities of *Salmonella typhi* antigens. The degree of agglutination (clumping) that occurs is measured. A higher level of agglutination indicates a higher concentration of antibodies, suggesting an active infection.

4. **Interpretation of Results**: If the titration shows a significant level of antibodies against *Salmonella typhi*, it confirms that the patient is likely suffering from typhoid fever.

5. **Conclusion**: Therefore, the confirmation test for typhoid is the Widal test, which helps in diagnosing the disease by detecting specific antibodies in the patient's serum.