What is the blood test mono absolute?

The mono absolute blood test, often referred to as the absolute lymphocyte count, is used to evaluate the presence of infectious mononucleosis, commonly caused by the Epstein-Barr virus. It measures the absolute number of lymphocytes in the blood, specifically looking for atypical lymphocytes that are indicative of an infection. This test is typically part of a broader panel that includes tests for heterophile antibodies. Elevated levels of atypical lymphocytes can suggest an active infection or other immune responses.