[Borrelia-associated dermatoses]

Erythema chronicum migrans (E.c.m.), Acrodermatitis chronica atrophicans (A.c.a.) and Lymphadenosis benigna cutis (L.b.c.) are infectious diseases according to Koch's criteria, after the infectious agent-Borrelia-Burgdorferi-could could be isolated. Clinic, pathology and therapy of these three diseases are presented in detail. The correlation to the lyme disease is being discussed. We believe that E.c.m., A.c.a. and L.b.c. are different entities determined by the virulence of the infectious agent and the individual immunological response.