Monocyte Manual Percent

This test measures the percentage of monocytes in your blood using a manual differential. A laboratory professional examines a stained blood smear under a microscope and counts how many white blood cells are monocytes compared with other types.

Manual counting is often used to confirm or clarify automated analyzer results, especially when unusual cells are present or when the instrument flags a possible issue. It is part of the complete blood count with differential and helps describe your immune cell profile.

Monocytes are immune cells that help defend against infections, clear damaged tissue, and coordinate immune responses. Changes in their proportion can occur with infections, inflammatory conditions, recovery after an illness, certain blood disorders, or after specific treatments.

Your clinician may order a manual percent when the automated differential is uncertain, when the blood smear needs review, or when tracking changes in your white cell pattern. The result, combined with your symptoms and other blood counts, can guide further testing, monitoring, or treatment decisions.

Results are interpreted alongside your total white blood cell count, the absolute monocyte count, and the rest of the differential. A higher proportion can be seen with ongoing inflammation, some infections, or specific bone marrow conditions. A lower proportion can occur with bone marrow suppression, severe illness, or after certain medicines.

If your result is unexpected, your clinician may repeat the test, review the blood smear, or request additional studies such as infection testing or specialized cell analysis. Trends over time and how you feel are often more informative than a single value. Do not change medications or supplements without medical advice.