Widal test


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Widal test

[we′däl ‚test]
(immunology)
A macroscopic or microscopic agglutination test for the diagnosis of typhoid fever and other Salmonella infections by using killed or preserved bacteria as the antigen.
References in periodicals archive ?
Because typhoidal Salmonella antibodies are known to cross-react with other antigens including those from non-typhoidal Salmonella and malaria antigens, the use of Widal test as diagnostic tool in patients with malaria may lead to misleading results as demonstrated by some studies from Nigeria.
The interpretation of Widal test results, when diagnosing concurrent malaria and typhoid fever must therefore be done with a lot of caution.
Although the Widal test is far from being a perfect diagnostic tool, in endemic areas, the Widal test is still of significant diagnostic value provided judicious interpretation of the test is made against a background of pertinent information, especially data which relate to agglutinin levels in normal individuals and in non-typhoidal fevers common in the region (45).
Interference by malaria in the diagnosis of typhoid using Widal test alone.
False positive modified Widal test in acute malaria.
Diagnosis of typhoid fever in Nigeria: misuse of the Widal test.
Diagnostic value of Widal test for typhoid fever in Singapore.
Retrospective study to determine the diagnostic value of Widal test in nonendemic country.
Diagnostic value of single, pre-treatment Widal test in suspected enteric fever cases in the Philippines.
Usefulness of Widal test in diagnosing childhood typhoid fever in endemic area.
Value of a single-tube Widal test in diagnosis of typhoid fever in Vietnam.