{"id":"eosinophils-absolute","name":"Eosinophils (Absolute)","shortName":"Eosinophils (abs)","aliases":["Eos (Absolute)","Absolute Eosinophils","AEC","Eos#","Absolute Eosinophil Count","Eosinophils #","Total Eosinophil Count (TEC)","Eosinophils Abs","Eosinophil count","Eosinophils, Absolute","Eosinophil Absolute","Eos Abs","Eos Absolute","ABSOLUTE EOSINOPHILS","Absolute Eosinophil","Eosinophil Count, Absolute","Eosinophils (Absolute Count)","Eosinophils Absolute Count","Eosinophil #","Eosinophil Number","Total Eosinophil Count","Eosinophil Count - Total Blood","Eosinófilos Absolutos","Eosinophile absolut"],"abbreviations":["AEC","TEC","EO#"],"loinc":[{"code":"711-2","primary":true},{"code":"712-0","primary":false},{"code":"26449-9","primary":false}],"specimen":"whole-blood","units":[{"ucum":"10*3/uL","display":"×10³/µL"},{"ucum":"10*9/L","display":"×10⁹/L"},{"ucum":"/uL","display":"cells/µL"},{"ucum":"/mm3","display":"cells/mm³"}],"referenceRanges":[{"population":"14+","low":0,"high":0.5,"unit":"10*3/uL","unitDisplay":"×10³/µL","note":"ARUP lists 0 to 0.5 from age 14 (the same limit most guidelines use to define eosinophilia). Other labs print slightly narrower limits: Labcorp 0.0 to 0.4, Manchester 0.0 to 0.4, NSW Health Pathology 0.04 to 0.44 and Mayo 0.03 to 0.48 for adults. A classic textbook table gives 0 to 0.7. Counts also run lower in the morning than at night, so a result close to the limit can move on a repeat draw. Steroid medicines lower the count within days, so a result taken during steroid treatment can sit at the bottom of the range. Use the range printed on your own report first.","sources":[{"title":"CBC with Platelet Count and Automated Differential (test 0040003), hotline effective March 1, 2021: reference intervals","url":"https://ltd.aruplab.com/api/ltd/hotline/0040003/44232","publisher":"ARUP Laboratories","year":2021},{"title":"Complete Blood Cell Count (CBC) with Differential, Blood (test ID CBC): reference values","url":"https://www.mayocliniclabs.com/test-catalog/overview/9109","publisher":"Mayo Clinic Laboratories"},{"title":"Sample patient report, test 005013 (CBC with Diff, Platelet, NLR)","url":"https://files.labcorp.com/testmenu-d8/sample_reports/005013.pdf","publisher":"Labcorp"},{"title":"Haematology User Guide: Blood counts reference ranges","url":"https://mft.nhs.uk/app/uploads/2024/07/Blood-counts-reference-ranges.pdf","publisher":"Manchester University NHS Foundation Trust","year":2024},{"title":"NSW Health Pathology: Adult Reference Intervals (CPROAH Reference Ranges Adult)","url":"https://www.seslhd.health.nsw.gov.au/sites/default/files/2019-04/NSWHP%20Reference%20Ranges%20Adult%202019.pdf","publisher":"NSW Health Pathology","year":2019},{"title":"Normal Values for Leukocyte Concentration in Blood (Table 63-1)","url":"https://download.skyscape.com/download/ota/lonestar/76CD77F7-898A-4928-AE45-A3D54D0FF0F0/harrisons.ed19/content/HTML/c/tu13.htm","publisher":"Harrison's Principles of Internal Medicine, 19th edition (McGraw-Hill)","year":2015},{"title":"Eosinophil count - absolute","url":"https://medlineplus.gov/ency/article/003649.htm","publisher":"MedlinePlus Medical Encyclopedia (National Library of Medicine)","year":2025},{"title":"Diurnal variation of hematology parameters in healthy young males: the Bispebjerg study of diurnal variations","url":"https://pubmed.ncbi.nlm.nih.gov/21988588/","publisher":"Scandinavian Journal of Clinical and Laboratory Investigation","year":2011},{"title":"Blood basophil numbers in chronic ordinary urticaria and healthy controls: diurnal variation, influence of loratadine and prednisolone and relationship to disease activity","url":"https://pubmed.ncbi.nlm.nih.gov/12614448/","publisher":"Clinical and Experimental Allergy","year":2003}]}],"review":{"status":"ai-draft","label":"AI-drafted. Awaiting verification","lastReviewed":"2026-10-03"},"summary":"The number of eosinophils, white blood cells that take part in allergies and fight some parasites, in each microliter of your blood.","url":"https://bloodtesttracker.com/markers/eosinophils-absolute","notice":"Information, not medical advice. Ranges differ between labs, so the range on your own report is the one your result is judged against."}