Eosinophil count

**Eosinophil count** refers to a laboratory measurement of the number of eosinophils—a type of white blood cell—in peripheral blood. This value is typically obtained as part of a complete blood count with differential. Eosinophils play roles in immune defense against parasites and are involved in allergic responses and inflammation. An elevated eosinophil count (eosinophilia) can indicate conditions such as allergies, asthma, parasitic or fungal infections, autoimmune diseases, some cancers like leukemia or lymphoma, drug reactions, and other inflammatory disorders[1][5][7]. Low counts may be seen with alcohol intoxication or Cushing disease but are usually not clinically significant unless all white cells are low[1]. The eosinophil count itself is **not** a therapeutic target; rather it serves as an important clinical biomarker for diagnosis and monitoring of underlying diseases. --- **Note:** "Eosinophil count" is **not** a molecule or receptor but rather a quantitative clinical parameter derived from measuring cells in blood. It does *not* represent an actionable biological target such as an enzyme or receptor; therefore most fields above do not apply directly. If you seek information on "eosinophils" themselves—the cell type—or specific molecular targets within eosinophilic pathways (such as interleukin 5 receptor), those would be distinct entries requiring separate structured data[1][3][7].

Other names

Absolute eosinophil countEosinophils (when referring to the cell type, not the test)EOS blood testEosinophilia (refers to high levels, not the test itself)