(bә-rel″e-o´sis) infection with spirochetes of the genus Borrelia. Lyme borreliosis any of several different diseases that are caused by Borrelia burgdorferi and have similar manifestations, including Lyme disease, acrodermatitis chronica atrophicans, and erythema chronicum mi... Found on http://www.encyclo.co.uk/local/21001