Monocyte Blood Test

A monocyte blood test is a laboratory test that measures the number and percentage of monocytes in the blood. Monocytes are a type of white blood cell that play a role in the immune system’s response to infection and inflammation.

During the test, a small sample of blood is taken from a vein in the arm and sent to a laboratory for analysis. The normal range for monocyte levels is typically between 2% and 8% of the total white blood cell count.

Higher levels of monocytes may indicate the presence of an infection, inflammation, autoimmune disorders, or other medical conditions. Monocytes can also be elevated in response to certain medications or after surgery.

A healthcare provider may order a monocyte blood test as part of a comprehensive evaluation for a variety of medical conditions. The test can help diagnose and monitor conditions such as bacterial or viral infections, tuberculosis, autoimmune disorders, inflammatory bowel disease, and certain types of cancer.

It is important to note that the monocyte blood test is not specific to any one medical condition, and higher levels of monocytes may be seen in a variety of conditions. A healthcare provider can interpret the results of the test in the context of the individual’s medical history and other test results, and develop an appropriate treatment plan if necessary.

This page is provided for educational and informational purposes only and does not constitute the provision of medical advice or professional services. The information provided should not be used for diagnosing or treating a health problem or disease, and those seeking personal medical advice regarding any of the tests and conditions referenced above are advised to consult with a licensed clinician. Always seek the advice of your qualified health provider regarding a medical condition and do not disregard professional medical advice or delay in seeking it because of any information on this page. If you think you may have a medical emergency, immediately call 911 or go to the nearest urgent care center or hospital.


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