The authors present a review of contemporary views on the most frequent anthropozoonosis - Lyme borreliosis. They mention its history, microbiology of the causal agent Borrelia burgdorferi, epidemiology, pathogenesis, laboratory and clinical diagnosis. The authors describe also briefly the clinical stages, forms and possible treatment.

        Key words: Lyme borreliosis, Borrelia burgdorferi, erythema migrans, anthropozoonosis, tick.