A high white blood cell count typically indicates a bacterial or viral infection; a disorder of the immune system; a reaction to medication; leukemia; allergic reaction; stress; or smoking, as stated by Mayo Clinic. Tube... More »

Causes of low blood cell counts in children include leukemia, chemotherapy or radiation treatment, and lack of sufficient vitamin B-12 in the diet, states Children’s Health Network. An infection such as tuberculosis and ... More »

A high white blood cell count is associated with cancers of the blood-forming tissues, such as acute lymphocytic leukemia, acute myelogenous leukemia and chronic myelogenous leukemia, explains Mayo Clinic. Caused by an o... More »

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A high white blood cell count may indicate anemia, infection, allergic reaction or leukemia, states MedlinePlus. Other causes include extensive tissue damage, cigarette smoking and severe mental or physical stress. Takin... More »

A high absolute neutrophil count may indicate inflammation, infection, stress, reaction to medication or the presence of cancer, according to HealthTap contributor Dr. Reid Blackwelder. In most instances, levels above 8,... More »

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 »

A high white blood cell count indicates an underlying problem, such as an infection or reaction to a medication. High white blood cell counts must be evaluated by a doctor, according to Froedtert & the Medical College of... More »