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 ?
TUBEX(r) test versus Widal test in the Diagnosis of Typhoid fever in Kafr-El Shekh, Egypt.
So, Widal test may be regarded as an important diagnostic tool for diagnosing enteric fever in strongly suspected cases in our country.
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 Widal test was performed by double dilution technique using salmonella antigens (Span Diagnostic Limited, Surat, India).
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.
typhi Case 2 Widal test Fourfold rise in antibody Case 3 Blood culture Growth positive for S.
Serum Widal test revealed titre of less than 1/20 for each of TO, TH, AO, BO antibodies.
Blood culture grew Salmonella Typhi sensitive to ceftriaxone, rectal swab grew no organism, and Widal test report was TO (antibody against somatic antigen) 1:160, TH (antibody against flagellar antigen) 1:320.
The decreasing incidence of Salmonella species isolation may be due to the over-diagnosis of typhoid fever based on Widal test and treatment for the same by many private medical practitioners.
7 mg/dL; Widal test negative; rashes TLC 6,800/[mm.
Blood for MP and Widal test were also found to be negative.