| Sex | Toxin A | Toxin A & B | Enzyme | Culture | ||||
| − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | |
| Male | 33 (55.0) | 8 (13.3) | 35 (58.3) | 6 (10.0) | 23 (38.3) | 18 (30.0) | 37 (61.7) | 4 (6.7) |
| Female | 13 (21.7) | 6 (10.0) | 16 (26.7) | 3 (5.0) | 14 (23.3) | 5 (8.3) | 16 (26.7) | 3 (5.0) |
| Total | 46 (76.6) | 14 (23.3) | 51 (85.0) | 9 (15.0) | 37 (61.7) | 23 (38.3) | 53 (88.3) | 7 (11.7) |
| P value | 0.239 (NS) | 0.593 (NS) | 0.154 (NS) | 0.389 (NS) | ||||