Herpesvirus infections of the CNS are prevalent in all segments of the
population, and are an important health care issue. The family of her
pesviruses consists of a large group of double-stranded DNA viruses th
at includes herpes simplex virus type 1 (HSV-1), herpes simplex virus
type 2 (HSV-2), cytomegalovirus, Epstein-Barr virus, varicella-zoster
virus, B virus, herpesvirus 6, and herpesvirus 7. In addition to produ
cing infection when the host initially acquires the virus, an importan
t property shared by these viruses is the ability to produce latent in
fection and to be reactivated.