Cytomegalovirus is a large herpes-type virus commonly found in humans that can cause serious infections in people with impaired immunity. The infection may result in pneumonia, gastroenteritis, retinitis or encephalitis. Antiviral medicines may stop the replication of the virus, but will not destroy it.
Review Date 4/9/2018
Updated by: Michael M. Phillips, MD, Clinical Professor of Medicine, The George Washington University School of Medicine, Washington, DC. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.