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 »

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 »

A white blood cell count is a test that measures the number of white blood cells in the blood, according to MedlinePlus. The test is performed by taking a small blood sample from a vein. A normal white blood cell count r... More »

www.reference.com Health Diagnostics & Imaging

Lymphocytes are one type of white blood cells that help the body fight off infection, so they are always present in blood, according to WebMD. However, lymphocytes should only make up 25 to 40 percent of all white blood ... More »