A rare and life threatening complication of prosthetic valve endocarditis.

Up to 70% of cases of Guillain-Barré syndrome (GBS) follow a preceding infection and a number of infectious agents have been described. We present a previously unreported association of Streptococcus viridans infective endocarditis affecting a prosthetic aortic valve and Guillain-Barré syndrome. This case highlights that this potentially life-threatening diagnosis should be considered in any patient presenting with symptoms of peripheral nervous system dysfunction following an infective illness.