CD40LG and bartonellosis: The twenty sera from patients with bartonellosis, 20 from patients with either human monocytic ehrlichiosis or human granulocytic anaplasmosis and 20 from patients with Lyme borreliosis showed no reaction for either IgG or IgM antibodies in the B. duncani and B. microti IFA tests at a serum dilution of 1:20.