What Does Low Neutrophil Count Mean?
May 13, 2022
Source: Cainiu Health
Dr. Pan Yongyuan
Introduction
Neutrophils are a subtype of white blood cells in peripheral blood. A neutrophil percentage below 40% on a complete blood count (CBC) is termed neutropenia. There are numerous causes of neutropenia, the most common being drug-induced. Additionally, certain infections—particularly viral infections such as hepatitis viruses and Epstein-Barr virus (EBV) infection—can also lead to neutropenia.
Everyone hopes to maintain good health; however, some individuals may experience a suboptimal health state—often termed “sub-health”—which warrants timely medical attention. What does it mean when neutrophil levels are low?
What Does Low Neutrophil Count Mean?
Under normal circumstances, neutrophils constitute a subtype of peripheral blood white blood cells. A neutrophil percentage below 40% on a routine complete blood count (CBC) is clinically defined as neutropenia (low neutrophil count). Detailed analysis follows:
There are numerous potential causes of neutropenia, the most common being drug-induced. Additionally, certain infections—particularly viral infections such as hepatitis viruses and Epstein-Barr virus (EBV)—can lead to neutropenia. Some parasitic and rickettsial infections may also cause reduced neutrophil counts. Hematologic malignancies—including large granular lymphocyte leukemia—can likewise result in neutropenia.
Moreover, benign hematologic disorders—including aplastic anemia and paroxysmal nocturnal hemoglobinuria—may also cause neutropenia. Neutropenia can occur in certain rheumatic diseases, such as rheumatoid arthritis, systemic lupus erythematosus (SLE), and other autoimmune rheumatic conditions. Therefore, once neutropenia is detected, prompt identification of its underlying cause is essential, followed by targeted treatment aimed at restoring neutrophil counts.
If a routine CBC reveals a low neutrophil percentage, patients should promptly consult a healthcare provider to determine the underlying cause. Treatment should be guided by a physician and tailored to the specific etiology. We hope this information proves helpful!
