{"id":"widal-test","name":"Widal test (typhoid O and H agglutinins)","shortName":"Widal test","aliases":["Widal Test","Typhoid O H Antibodies","Salmonella typhi Widal","Widal Slide Test","Widal Tube Test","Widal Agglutination Test","Typhoid Widal","Widal Reaction","Widal Interpretation","Widal Result","Typhoid Fever Antibodies, Widal","Reacción de Widal","Reacciones Febriles Widal"],"abbreviations":["Widal"],"loinc":[],"specimen":"serum","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"The overall reading of a Widal test, which looks for antibodies to typhoid bacteria. It is easy to misread and cannot confirm typhoid on its own.","url":"https://bloodtesttracker.com/markers/widal-test","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}