{"id":"mono-spot","name":"Mononucleosis Screen (Heterophile Antibody)","shortName":"Mono Spot","aliases":["Heterophile Antibody","Infectious Mononucleosis Screen","Mono Spot","Monospot Test","Mono Screen","Monospot","Heterophile antibody (Mono spot)","Mononucleosis Spot Test","Mononucleosis Screen","Heterophile Antibody Test","Heterophile Agglutination Test","Paul-Bunnell Test","Infectious Mono Screen","Mono Test","Heterophil Antibody"],"abbreviations":["Monospot","IM screen"],"loinc":[{"code":"31418-7","primary":true},{"code":"6425-3","primary":false},{"code":"11610-3","primary":false}],"specimen":"serum","units":[],"referenceRanges":[],"review":{"status":"ai-verified","label":"AI-verified against cited sources. Awaiting expert review","lastReviewed":"2026-10-03"},"summary":"A quick blood test for heterophile antibodies, which most often appear during infectious mononucleosis (mono), usually caused by the Epstein-Barr virus.","url":"https://bloodtesttracker.com/markers/mono-spot","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}