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Interpret Your Widal Test (Typhoid) Results

Enter your Widal value below and get an instant, free AI interpretation — a plain-English explanation checked against WHO/IFCC reference ranges.

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This AI-generated interpretation is for educational purposes only and does not constitute medical advice, diagnosis, or treatment. Results may vary based on individual health factors not captured here.

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Supported: Blood tests, urine tests, thyroid, lipid panel, liver function, kidney function, HbA1c, and other numerical lab results. Not supported: ECG, ECHO, ETT, CT scans, MRI, X-rays, PET scans, histopathology, and other diagnostic imaging reports. 🚀 Coming Soon

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Widal Test (Typhoid) Normal Ranges

The Widal test is an agglutination test that detects antibodies (IgM and IgG) against Salmonella typhi and Salmonella paratyphi antigens — specifically the O (somatic/cell wall) and H (flagellar) antigens.

Reference Range	Unit	Notes
< 1:80	titer	O antigen <1:80 considered normal in non-endemic areas; significant ≥1:160 (or ≥1:320 in endemic areas)

Common Causes of High Widal

Active typhoid fever (Salmonella typhi infection)Paratyphoid fever (Salmonella paratyphi A, B, or C)Prior typhoid infection (antibodies persist for months to years)

Common Causes of Low Widal

Early acute typhoid (first 5–7 days — antibodies have not yet developed)Typhoid treated with antibiotics before serological response develops

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Reference ranges, causes, symptoms, preparation, and FAQs.

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