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IgG specific for S. rectivirgula in plasma of dairy barn workers compared to that in plasma of controlsa
| Population (n) | No. of subjects (%) with each immune response intensity |
||
|---|---|---|---|
| Negative | Total positive | Strongly positive | |
| Control subjects (35) | 30 (85.7) | 5 (14.3) | 1 (2.9) |
| Workers (29) | 18 (62.1) | 11 (37.9) | 3 (10.3) |
Frequency distribution between workers and control subjects is significantly different (P = 0.0427).
