Research Tracker›Biomarker Atlas›Asthma›Blood Eosinophil Count

Blood Eosinophil Count in Asthma

Blood Eosinophil Count belongs to the pulmonary group of Asthma markers and is reported to be raised relative to the reference group of the cited comparison (asthma patients vs normal reference range). The source does not tie this marker to a specific symptom cluster, so it is best read as a biological signal rather than a symptom predictor. This entry summarises Bacharier et al. 2024. Group-level associations like this do not translate into an individual diagnostic cut-off.

↑ ElevatedPulmonary

Summary

Direction in Asthma↑ Elevated — higher than in the comparison group
CategoryPulmonary
Compared againstasthma patients vs normal reference range
SourceBacharier et al. 2024 — doi:10.1016/j.jaci.2023.09.044
Condition atlasAsthma Biomarker Atlas

Related Pulmonary markers in Asthma

Full list: Asthma Biomarker Atlas.

Frequently asked questions

Is Blood Eosinophil Count high or low in Asthma?

Elevated. Studies summarised in the OSMF atlas report higher Blood Eosinophil Count in Asthma than in the reference group of the cited comparison (asthma patients vs normal reference range). Source: Bacharier et al. 2024.

Which test measures Blood Eosinophil Count?

The atlas record does not list a standardised clinical test code (LOINC) for Blood Eosinophil Count, which usually means it was measured with research assays or study-specific protocols rather than a routine clinical panel. Check the cited source for the exact method.

Is one abnormal Blood Eosinophil Count result diagnostic of Asthma?

No. No single biomarker is diagnostic of Asthma. Blood Eosinophil Count findings come from group comparisons, overlap considerably between patients and controls, and vary with study design, timing and comparison group. A result should be interpreted by a clinician alongside symptoms, history and other tests.

Cite this page

Open Source Medicine Foundation. (2026). Blood Eosinophil Count in Asthma: direction, evidence and what it means. OSMF Research Tracker. Retrieved October 7, 2026, from https://research.opensourcemed.info/biomarkers/asthma/blood-eosinophil-count.html
Get OSMF research updates. New biomarker, trial and treatment evidence summaries by email.
Subscribe on Substack

Last reviewed: 2026-07-02 · Page generated from asthma.json · Browse: Asthma atlas · Biomarker Index · All marker pages

Disclaimer: This page is an educational synthesis of published, peer-reviewed research and is not medical advice. Biomarker findings vary across studies with case definitions, comparison groups, timing and assay methods. Direction of change reflects the predominant finding in the cited source and does not establish a diagnostic threshold. Discuss any test result with a qualified clinician.