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Table 1 Results of serology for B. henselae in patients with Henoch-Schonlein purpura, and in a control group

From: Bartonella seropositivity in children with Henoch-Schonlein purpura

  n Titer < 1:64 Titer 1:64 – 1: 128 Titer ≥ 1: 256 Total seropositives
Current HSP 6 3 (50%) 2 (33%) 1 (17%) 3 (50%)
Remote HSP 22 8 (36%) 10 (45%) 4 (18%) 14 (63%)
HSP ≤ 12 months earlier 11 6 (54%) 2 (18%) 3 (27%) 5 (45%)
HSP > 12 months earlier 17 5 (29%) 10 (59%) 2 (12%) 12 (71%)
All HSP 28 11 (39%) 12 (43%) 5 (18%) 17 (61%)
Controls 28 22 (79%) 6 (21%) 0 6 (21%)