Viral infection of the esophagus. It often occurs in immunocompromised patients and it is caused by cytomegalovirus or herpes simplex virus. Symptoms include pain on swallowing, fever, and retrosternal burning. The disease is viral esophagitis (MONDO_0003846, a Monarch Disease Ontology term). Also known as: Viruses caused esophagitis (disease), Viruses esophagitis (disease).