The purpose of the Mono Screen is to test for which viral infection?

The correct answer is Epstein-Barr virus. The Mono Screen is specifically designed to detect heterophile antibodies produced in response to an infection caused by the Epstein-Barr virus (EBV), which is primarily known for causing infectious mononucleosis, commonly referred to as "mono." This test helps identify the presence of these antibodies in a patient's bloodstream, confirming the infection. It is a key diagnostic tool used in clinical settings for individuals presenting symptoms indicative of mononucleosis, such as fatigue, sore throat, and lymphadenopathy.

The other options listed do not relate to the Mono Screen: HIV is tested with different assays specifically designed for identifying the Human Immunodeficiency Virus, rheumatoid arthritis is typically diagnosed through other laboratory tests looking for specific antibodies or inflammatory markers, and H. Pylori infection is diagnosed with tests that detect the presence of the bacteria in the stomach lining, such as breath tests, blood tests, or biopsies, rather than through the Mono Screen.