( us-1: the number of annual cases is two...)Genetic susceptibility in viral encephalitis,Health

us-1: the number of annual cases is two per million people, according to the University of Maryland Medical Center.

Nonetheless, herpes simplex encephalitis, which was first described in 1941, is the most common type of sporadic viral encephalitis in developed countries, accounting for about 10 to 20 percent of all viral encephalitis cases, according to the University of Maryland Medical Center. Before the advent of anti-viral drugs vidarabine in 1973 and acyclovir in 1981, mortality rates reached up to 70 percent. While the introduction of anti-viral treatment has been a boon to patients, brain damage still poses a substantial risk.

"In contrast to most current thinking, we suspected that herpes simplex encephalitis susceptibility could be inherited as a monogenic trait resulting in the specific impairment of immunity to herpes simplex virus-1," Beutler said. "Here we have defined a genetic lesion that is permissive for an infection: a trait that most would regard as quintessentially environmental in cause. It is likely that other mutations will also be found to permit herpes simplex virus encephalitis, and likely that other infectious diseases will ultimately be traced to mutations that affect UNC-93B."

Source-Eurekalert
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