A white blood cell count test may be necessary to find the absolute basophil count . This test can help doctors get a better picture of the range of basophils in the blood. Learn about the normal range and significance of basophil count , including causes of high and low levels, and interpretation of blood tests. Basophils are a type of white blood cell. White blood cells work to keep you healthy by fighting off viruses, bacteria, and fungi. Learn more.