Poliomyelitis Due to West Nile Virus

Abstract

To the Editor: Muscle weakness is a common finding and an important predictor of death in patients with West Nile virus encephalitis. 1,2 Yet this important sign does not have a defined pathological basis.In monkeys, horses, and birds, West Nile virus causes poliomyelitis. [3]4][5] Our clinical and electrodiagnostic findings in three consecutive patients withThe New England Journal of Medicine Downloaded from nejm.org