A high white blood cell count can be caused by a variety of factors, including infections, immune system disorders, bone marrow illnesses and certain viruses, according to Mayo Clinic. Cigarette smoking and high stress l... More »

Infections and inflammation usually cause high white blood cell counts, according to the American Association for Clinical Chemistry. The elevated count can be also be attributed to allergic responses, severe stress and ... More »

Common causes of a high white blood cell count include infection, drug reaction, immune system disorder and bone marrow disease, according to Mayo Clinic. Severe allergic reactions, smoking, and high levels of physical o... More »

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A high white blood cell count affects the ability to donate blood, since it is a sign of infection, disease, drug reaction or immune system disorder that must be resolved before donating, state Mayo Clinic and the Americ... More »

In adults, a white blood cell count of over 11,000 white blood cells per microliter of blood is typically considered high, although normal ranges vary from practice to practice, states Mayo Clinic. The normal range is 4,... More »

A person knows if his white blood cell count is normal by getting a complete blood count, according to Mayo Clinic. This test measures white blood cells, red blood cells, hemoglobin, hematocrit and blood platelets. More »

The normal white blood cell count for a female is between 3.5 and 10.5 billion cells per liter, as stated by Mayo Clinic. Some doctors measure this in deciliters, making a normal count 3,500 to 10,500 per deciliter. More »