Eosinophils are white blood cells that participate in the immune response, states MedlinePlus. The absolute eosinophil count measures the number of eosinophils present in a blood sample. An absolute eosinophil count of l... More »

An elevated eos in the blood signifies an increased eosinophil count, according to the American Association for Clinical Chemistry. Eosinophils are a component of the immune system and can be elevated in patients with pa... More »

Causes of an elevated eosinophil count include autoimmune diseases, allergies, skin disorders, tumors and endocrine disorders, notes Mayo Clinic. The medical term for an elevated eosinophil count is eosinphilia. More »

The most common blood test, the complete blood count, or CBC, measures red blood cells, white blood cells, hemoglobin, hematocrit, platelets and mean corpuscular volume of the blood, according to the National Heart, Lung... More »

A PLT blood test measures the number of platelets in the blood, states MedlinePlus. Platelets help blood clot. Normal values range from 150,000 - 400,000 platelets per microliter of blood, though these reference ranges v... More »

A complete blood count, or CBC, with differential blood test reveals information about the number of white blood cells, platelets and red blood cells, including hemoglobin and hematocrit. The blood test also gives inform... More »

The purpose of a leukocyte esterase urine test is to screen for a substance that suggests the presence of white blood cells, which may indicate a urinary tract infection, according to MedlinePlus and WebMD. The test is p... More »