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About
The Widal test is a diagnostic tool used to detect typhoid fever by measuring the presence of specific antibodies (O and H antigens) in a patient\s blood. These antibodies are produced in response to infection with Salmonella typhi and Salmonella paratyphi, the bacteria responsible for typhoid and paratyphoid fevers. The test involves mixing the patient\s serum with antigens from these bacteria and observing for agglutination (clumping), which indicates the presence of the antibodies. It\s often used in areas where typhoid is endemic but has limitations in accuracy and is usually supplemented by other diagnostic methods.
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