laboratory diagnostic - infectious diseases - Borreliosis - direct diagnosis - PCR; Skin biopsy, joint biopsy, synovial fluid, pericardic fluid 0.5 ml (minimum) CSF: FROZEN < 4H, 2 mL (minimum) EDTA whole blood or blood derivatives (serum/plasma): Refrigerated; Put biopsies in a dry tube or with a transport medium (M4RT); All histological fixatives are forbidden. Real-time PCR, ssso, todylaboratories®, bmn, code L16LD1912