{"id":"widal-typhi-o","name":"Widal, Salmonella Typhi O Titer","shortName":"Widal Typhi O","aliases":["S. Typhi O","Salmonella Typhi O","Typhi O","S. typhi 'O'","Typhoid O","Tifico O","Tífico O","Salmonella typhi O Ab titer","Widal Test Typhi O","Salmonella typhi O antibody","Typhoid O antibody","Typhoid O titer","Widal TO","Salmonella typhi O agglutinin","Typhoid O agglutinins"],"abbreviations":["TO","S. Typhi O"],"loinc":[{"code":"34372-3","primary":true},{"code":"42959-7","primary":false},{"code":"23930-1","primary":false},{"code":"17566-1","primary":false}],"specimen":"serum","units":[],"referenceRanges":[],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"A Widal test titer for the typhoid bacterium's O antigen. One result cannot confirm or rule out typhoid fever.","url":"https://bloodtesttracker.com/markers/widal-typhi-o","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}