Typhoid is diagnosed by ____.

ultrasound

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widal test

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PCR

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biopsy

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Solution

The correct option is B widal test
Typhoid is diagnosed by using the widal test. This test is based on the principle that the patient suffering from typhoid would have generated a large number of antibodies against Salmonella. When these antibodies react with the antigens of Salmonella typhi, they cause agglutination (clumping of blood).

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Typhoid is an acute infectious disease caused by Salmonella typhi which is found in human intestine.

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