laboratory diagnostic - infectious diseases - Bartonellosis - direct diagnosis - PCR, Lymph node biopsy or puncture fluid, 2 mL of EDTA whole blood, serum or plasma; Biopsies must be placed in a dry tube as they are or with an M4RT transport medium. All histological fixatives are forbidden. Real-time PCR, ssso, todylaboratories®, bmn, code L16LD1902