What is being tested?There are five types of white blood cells, each with different functions:
neutrophils,
lymphocytes,
monocytes,
eosinophils and
basophils. The differential reveals if these cells are present in normal proportion to one another, if one cell type is increased or decreased, or if immature or abnormal cells are present. This information is helpful in diagnosing specific types of illnesses that affect the immune system.
White blood cells are made in your bone marrow or lymphoid system. They protect your body against infection and aid your immune system. If an infection develops, white blood cells attack and destroy the bacteria or virus causing the infection.
