MONDO_0006882 (orchitis) is inflammation of one or both testes due to viral or bacterial infections. Signs and symptoms include enlargement or tenderness of the affected testis, inguinal lymphadenopathy, blood in the semen, and pain during urination, intercourse, or ejaculation. Also known as: Inflammation of testis, Orchititis, inflammation of testis, orchitis (disease), testis inflammation, testisitis.