General characteristics of HLA-B27 positive and negative patients with presumed ocular bartonellosis (POB)
| General characteristics |
HLA-B27 positive (n=6) | HLA-B27 negative (n=13) |
| Mean (range) age (years) | 45 (28–55) | 49 (15–69) |
| Race | ||
| White | 3 | 12 |
| Non-white | 3 | 1 |
| Animal exposures | 4 | 9 |
| Systemic CSD | 0 | 3 |
| Mean (range) follow up after diagnosis of POB (months) | 27 (12–46) | 30 (14–46) |
| B henselae | ||
| EIA-IgG ⩾1:900 | 5 | 10 |
| EIA-IgM ⩾1:250 | 1 | 4 |
CSD = cat scratch disease.