Monocytes

Monocytes are white blood cells that help your body respond to infection and inflammation.

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Monocytes
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Test Summary

Sample Type 
Blood
Required Blood
1 mL
Analysis Type
Whole blood (EDTA)
Collection method
In person at the lab; at-home where available

Why test

Monocytes

?

Clinicians check monocytes as part of a complete blood count with differential to understand your immune activity. It can help explain signs like fever, fatigue, or lingering inflammation, and monitor recovery after illness. People on medicines that affect bone marrow or immunity may also benefit. Results often guide follow-up with other white cell types or repeat testing. You can test this marker with Aniva across Germany and Finland.

What is

Monocytes

?

Clinicians check monocytes as part of a complete blood count with differential to understand your immune activity. It can help explain signs like fever, fatigue, or lingering inflammation, and monitor recovery after illness. People on medicines that affect bone marrow or immunity may also benefit. Results often guide follow-up with other white cell types or repeat testing. You can test this marker with Aniva across Germany and Finland.

What insights will i get from

Monocytes

?

High: May reflect recent or ongoing infection, inflammation, recovery after illness, or effects of certain medicines or procedures (like spleen removal). Trends with other white cells offer helpful context.
Low: Can appear with severe illness, some medicines, or reduced bone marrow activity. If you were acutely unwell, a repeat test after recovery can clarify.

Sample type & collection

  • Sample: Blood
  • Fasting: No
  • Best timing: Morning; when well, not during acute illness
  • Collection: Venipuncture into EDTA (purple-top) tube
  • Typical volume: 1 mL
  • Analysis: Automated hematology analyzer with differential
  • Prep tips: Hydrate; avoid heavy exercise 24 hours; share medications and supplements
  • Turnaround: 1–2 business days

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Monocytes

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Monocytes
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Limits & interferences with

Monocytes

:

Common factors include recent infections, surgery, or inflammation; strenuous exercise; smoking; stress; and pregnancy. Medicines such as steroids or chemotherapy, sample delays, and dehydration can also shift white cell counts. Testing when you feel well and sharing medications and supplements helps interpretation.

Special situations: confirm or adjust results during acute illness, after major exercise, during pregnancy, or when starting or changing immune-active medicines.

Questions about

Monocytes

:

What do monocyte results mean in plain terms? They show how active part of your immune system is. High or low results need context from other blood cells and your symptoms.

Do I need to fast? No. Fasting is not required for a monocyte or CBC test.

What can affect my monocyte level? Recent infections, stress, smoking, strenuous exercise, pregnancy, and some medicines can change levels temporarily.

How often should I test? Most people test only when a clinician orders it. If you were ill or on new medicines, a repeat in a few weeks may help.

How long do results take? Most labs report results within 1–2 business days.

What should I discuss with my clinician? Share recent illnesses, medications, supplements, and symptoms. Ask how your result trends with other white blood cells.

Sources:

  • MedlinePlus — Complete Blood Count (CBC). (2024). https://medlineplus.gov/lab-tests/complete-blood-count-cbc/
  • ARUP Consult — Complete Blood Count with Differential and Peripheral Smear. (2023). https://arupconsult.com/content/complete-blood-count
  • Mayo Clinic — White blood cell count. (2024). https://www.mayoclinic.org/tests-procedures/white-blood-cell-count/about/pac-20385156
  • NHS — Full blood count (FBC). (2023). https://www.nhs.uk/conditions/blood-tests/full-blood-count-fbc/
  • American Society of Hematology — Blood Tests. (2024). https://www.hematology.org/education/patients/blood-tests
Medical disclaimer: This content is for informational purposes only and is not medical advice. Always discuss results with a qualified healthcare professional.

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