Widal Test is an agglutination test which detects the presence of serum agglutinins (H and O) in patients serum with typhoid and paratyphoid fever.
This test helps to detect presence of salmonella antibodies in a patient’s serum.
Agglutination is a positive test result and if the positive reaction is observed with 20 ul of test sample, it indicates presence of clinically significant levels of the corresponding antibody in the patient serum.
No agglutination is a negative test result and indicates absence of clinically significant levels of the corresponding antibody in the patient serum.
