Mayo Clinic Health Manager
Get free personalized health guidance for you and your family.
Get Started
About our e-newsletters
- Free e-newsletters
- Mayo Clinic expertise
- We do not share your e-mail address
Housecall, our weekly general-interest e-newsletter, keeps you up to date on a wide variety of health topics with timely, reliable, practical information, recipes, blogs, questions and answers with Mayo Clinic experts and more. Our biweekly topic-specific e-newsletters also include blogs, questions and answers with Mayo Clinic experts, and other useful information that will help you manage your health.
Housecall Archives
Mayo Clinic Housecall
Stay up to date on the latest health information.
What you get
- Free weekly e-newsletter
- Mayo Clinic expertise
- Recipes, tools and other helpful information
- We do not share your e-mail address
Definition
By Mayo Clinic staffHigh white blood cell count is an increase in disease-fighting cells (leukocytes) circulating in your blood. High white blood cell count is also called leukocytosis.
The threshold for high white blood cell count varies from one medical practice to another. A count of more than 10,500 leukocytes in a microliter of blood is generally considered a high white blood cell count. The threshold for leukocytosis in children varies with age and sex.
There are five major subtypes of white blood cells, each with a different disease-fighting activity. The results of a white blood cell count usually indicate the level of each type. If you have a high white blood cell count, you most likely have an increase in only one cell type.
