The cause of diarrhea can be bacteria or viruses. The etiology of diarrhea may depend on age and immune status. Diarrhea in immunocompromised people such as the elderly, those with underlying diseases (kidney failure, high blood pressure, diabetes, cancer, etc.) can be caused by many factors. Among them, Cytomegalovirus is often overlooked.

CMV DNA test is one of the tests to check whether Cytomegalovirus virus exists in the patient's body or not. Detection of this virus can be done by culturing the virus or detecting the genetic material of this virus (CMV-DNA).