Learn about the normal range and significance of basophil count , including causes of high and low levels, and interpretation of blood tests. The absolute basophil count is a blood test measurement of the number of basophils in your blood. Basophils are one of the five types of white blood cells, along with neutrophils, eosinophils, lymphocytes, and monocytes. Learn about basophils, a type of white blood cell that helps fight infection and inflammation. Find out what causes abnormal basophil counts and how to interpret your absolute basophil count (ABC) test results.