Description
Number of Tests Included:
Single blood test measuring O & H antibody titers.
What is a Widal Test?
A serological test that identifies antibodies produced in response to Salmonella infection. The results are given as titers indicating antibody concentration.
Purpose of the Test:
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Diagnose typhoid and paratyphoid fever
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Evaluate prolonged fever, fatigue, or abdominal discomfort
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Support diagnosis when blood culture is not feasible
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Distinguish between active infection and past exposure (with caution)
Who Should Get This Test?
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Individuals with prolonged fever (>4–5 days), headache, and weakness
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People with digestive symptoms such as abdominal pain or diarrhea
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Individuals in typhoid-prone areas
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Patients suspected of enteric fever but without access to culture tests
Components of the Test:
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TO (Typhi O) antibody titer
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TH (Typhi H) antibody titer
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May include Paratyphi A & B titers depending on the lab
Understanding the Test Report:
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High O titer → Suggests active infection
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High H titer → Indicates past infection or vaccination
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Titers like 1:160 or above are often considered significant, but interpretation depends on region and symptoms
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Confirmatory tests or clinical correlation may be needed
Preparation and Procedure:
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Routine blood draw
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No special preparation needed
How is the Test Done?
A blood sample is tested using agglutination methods to measure O and H antibody levels.
Best Time for Test:
After 5–7 days of symptoms, when antibodies start rising.
Booking and Checking Reports:
You can book the Widal Test via SDL, choose home sample collection if available, and access your reports digitally.
