Reverse blot analysis of PCR products obtained from blood samples of A. phagocytophila-infected sheep. The oligonucleotide probes are shown as lines in the horizontal direction, and the biotin-labeled PCR products are perpendicular in the vertical direction. Samples 1 to 3, samples from A. phagocytophila variant 1-infected sheep; samples 4 to 8, samples from A. phagocytophila variant 2-infected sheep; B, blank controls (no DNA added); P, A. phagocytophila prototype-positive PCR control; V1, A. phagocytophila variant 1-positive PCR control.