Medical History Competency Practice Test

Oral herpes is most commonly caused by herpes simplex virus type 1. This virus specializes in infecting the oral region and, after the initial infection, tends to stay latent in the trigeminal ganglion, with possible recurrences that show up as cold sores on the lips or inside the mouth. That pattern—oral mucosal involvement with potential reactivation—is characteristic of HSV-1, making it the best answer for the term used to describe oral herpes.

The other viruses listed do not fit this specific presentation: Varicella zoster virus causes chickenpox and shingles, not the typical oral herpes lesion; cytomegalovirus tends to be asymptomatic or cause disease mainly in immunocompromised individuals; human papillomavirus causes warts and some cancers, not herpes lesions.