Neutrophils (abs.)
Immune system healthAlso known as: absolute neutrophil count, ANC, Neutros
The absolute count of neutrophils per liter of blood.
While neutrophil percentage shows the proportion among white blood cells, the absolute count reveals the actual number available to fight infections. This is clinically essential, because a normal percentage can mask a dangerously low absolute count if total white blood cells are reduced.
Reference range
Source: lab benchmark
Reference ranges may vary between labs and assays. Always interpret results with your healthcare provider.
Why this matters
Low neutrophils (neutropenia) dramatically increases infection risk. Even minor infections become serious, with symptoms including recurring fever, mouth sores, skin abscesses, and pneumonia. Dental problems and gum infections are common. Very low counts require protective isolation as normally harmless bacteria become dangerous.
High neutrophils indicate active bacterial infection with fever, localized pain, redness, swelling, and pus formation. Persistent elevation without infection might suggest inflammatory conditions, smoking effects, or blood disorders.
How this connects to other biomarkers
- Elevated absolute neutrophil count (ANC) with high hs-CRP is classic for bacterial infection or acute systemic inflammation.
- ANC < 1.5 × 10⁹/L defines neutropenia, < 0.5 × 10⁹/L is severe neutropenia with high infection risk — review medications (chemotherapy, antithyroid drugs, clozapine) and check Hemoglobin and Thrombocytes (Platelets) for pancytopenia.
- The NLR (Neutrophils/Lymphocytes) ratio is more prognostic than ANC alone in many settings.
How often should I test Neutrophils (abs.)?
Most adults benefit from yearly absolute neutrophil count testing as part of a CBC differential. Persistent or significant abnormalities prompt your clinician's follow-up rather than a fixed retest cadence.
At baseline / for screening: Once every 12 months from age 30 as part of a CBC with differential.
Included in
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