[The characteristics of progressive dementias in patients with herpetic encephalitis].

9 lethal cases of progressive dementias were analysed, both psychical and neurological disturbances characteristics on different stages of herpetic dementias were presented, a number of clinical morphological criteria of diagnosis ascertaining was described. It was determined that progressive dementias turned out to be one of the clinical forms of chronic CNS herpetic infection which was conditioned by prolonged persistence and activation of herpes simplex virus in brain tissue.