Abstract
Borreliosis or the Lyme disease (tick spirochaetosis) is caused by Borrelia Burgdorferi transmitted by the ticks of Ixodes family. Borreliosis is a multisystemic disease, affecting skin (erythema migrans), cardiac muscle (inflammatory process and ventriculo-atrial conduction disorders), joints (arthritis), and the nervous system (most often – meningopoliradiculoneuritis).The diagnosis is based mainly on serologic tests results: detection of antibodies IgM and IgG is prerequisite for antibiotic therapy which – if started early enough – prevents tardive organic complications.