| Characteristic | No. (%) of patients | |
|---|---|---|
| IgM-positive or IgG-positive n = 59 | IgM-positive n = 50 | |
| Age, yr | ||
| ≤ 19 | 7 (12) | 5 (10) |
| 20-39 | 21 (36) | 18 (36) |
| 40-59 | 17 (29) | 14 (28) |
| ≥ 60 | 14 (24) | 13 (26) |
| Male sex | 40 (68) | 34 68) |
| Area of residence | ||
| Brome Lake | 11 (19) | 9 (18) |
| Bedford | 8 (14) | 8 (16) |
| Cowansville | 16 (27) | 12 (24) |
| Bromont | 19 (32) | 18 (36) |
| Farnham | 2 (3) | 1 (2) |
| Other | 3 (5) | 2 (4) |
| Year of serologic testing | ||
| 2012 | 3 (5) | 2 (4) |
| 2013 | 19 (32) | 18 (36) |
| 2014 | 19 (32) | 17 (34) |
| 2015 | 18 (30) | 13 (26) |