TOPICS: Borrelia Burgdorferi, spirochete, northeastern U.S, Ixodes deer tick, Giemsa stain, deer, mice, bulls-eye rash, erythema migrans, Bell’s palsy, carditis, AV block, stage 2, atrioventricular block, migratory arthritis, encephalitis, doxycycline, amoxicillin, pregnant, children, cephalosporins