What is the normal range for monocytes?

Monocytes are a type of white blood cell that plays a crucial role in the immune system, particularly in the response to infections and inflammation. They are produced in the bone marrow and travel through the bloodstream to tissues, where they can differentiate into macrophages and dendritic cells to help combat pathogens.

The normal range for monocytes in the blood is typically 2-8% of the total white blood cell count. This percentage reflects the proportion of monocytes in relation to other types of white blood cells, such as neutrophils, lymphocytes, eosinophils, and basophils. Monocyte counts can vary based on a variety of factors, including age, sex, and health status, but the range provided is well-established in laboratory medicine and is accepted as the standard reference.

In contrast, the other ranges listed do not fall within the typical percentages for monocytes. For example, the ranges listed as 1-4%, 20-40%, and 55-70% correspond to other types of white blood cells or are altogether too high for normal monocyte levels. By understanding these percentages, you can better interpret laboratory results and assess a patient's immune function and response to disease.