Between the causes of facial paralysis, similar to Bell's palsy, recently are included those due to some families of spirochaeta (Borrelia burgdorferi) transmitted through tick-bite. These bacteria, besides de facial palsy, may produce several degrees of lymphocytic meningitis and subsequently the paralysis of the face, sometimes clumsy or recurrent. The treatment being the antibiotic drugs, never the corticoids. In the paper are explained prospectively the incidence of this disease in the AA's environment.