Infections: The Most Common Culprit By far, the most frequent cause of high white blood cell counts is infection. An elevated white blood cell count, medically termed leukocytosis, is a common finding on routine blood work that often prompts concern.
Neutrophil Surge: How Bacterial Infections Drive Elevated White Blood Cell Counts
A post-operative count increase is a standard expected finding in the recovery phase. Medication and Other Factors Certain medications and physiological states can elevate white blood cell counts without the presence of disease.
Conditions like leukemia involve the uncontrolled proliferation of abnormal white blood cells, which flood the bloodstream. In these scenarios, the body mistakenly attacks its own tissues, and the bone marrow continues to produce white blood cells in an attempt to manage the ongoing inflammatory response.
Neutrophil Surge in Response to Bacterial Infection
Similarly, severe viral infections can sometimes cause a lymphocytosis, where lymphocyte counts rise to combat the invading virus. Steroids, such as prednisone, are well-known for stimulating the release of stored white cells from the bone marrow, leading to a transient increase.
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