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 ?
In the above 2x2 contigency table, the Chi-square is 8.13 for association between the Widal test and Blood culture is statistically significant (P<0.005) for [alpha] =0.05, df=1.
Among the 100 clinically suspected typhoid fever cases 32 cases were both blood culture and widal test negative of which 08 cases were Immunoblot positive.
Alemayehu, "A comparative study of Widal test with blood culture in the diagnosis of typhoid fever in febrile patients," BMC Research Notes, vol.
Hence, establishing and updating the baseline Widal titre for a particular area are an important factor in the proper interpretation of the Widal test. Thus, assessment of the Widal baseline titre for healthy individuals in a specific geographical area should be performed from time to time.
So, Widal test may be regarded as an important diagnostic tool for diagnosing enteric fever in strongly suspected cases in our country.
Available serologic tests, including the Widal test, have limited value because of poor sensitivity and specificity for typhoid diagnosis, and difficulty with standardizing reagents and interpreting values across different settings.
All patients underwent investigations such as complete blood picture, liver and renal functions tests, stool and urine examinations, Widal test and blood culture on admission and thereafter if the children condition warranted it.
The Diazo test was found to have sensitivity, specificity and PPV of 86.7%, 85.7% and 83.9% respectively and Widal test was positive in 12 cases giving sensitivity, specificity and PPV of 40.0%, 91.4%, 80% respectively.
Socio-demographic data, presence or absence of operational criterion for suspected case of typhoid, rapid screening Widal test result and exposure to common meal, drinking water in the preceding one month was collected.
Each child was enrolled in separate proformas including the demographic data, chief complaints, associated symptoms, WIDAL test titres, and temperature recordings.
These include the well renowned Widal test, Typhidot, TUBEX and many others.