Relapsing fever is a bacterial infection characterized by recurrent episodes of fever and nonspecific symptoms following exposure to insect vector-carrying Borrelia species.
Treponema pallidum is the causative agent of syphilis, an infectious venereal disease in humans. Primary, secondary, tertiary latent stages.
Spirochetes are long, thin, flexible, spirally coiled helical bacilli. Spirochetes cause syphilis, Lyme disease, relapsing fever, leptospirosis, yaws.
Lyme disease or Lyme borreliosis is a vector-borne zoonotic disease caused by Borrelia burgdorferi.
Dark field microscopy is the most specific and sensitive technique to diagnose syphilis when an active chancre or condyloma lata is present.