| Residence | Toxin A | Toxin A & B | Enzyme | Culture | ||||
| − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | − (%) | + (%) | |
| Rural | 28 (46.7) | 7 (11.7) | 31 (51.7) | 4 (6.7) | 21 (35.0) | 14 (23.3) | 32 (53.3) | 3 (5.0) |
| Urban | 18 (30.0) | 7 (11.7) | 20 (33.3) | 5 (8.3) | 16 (26.7) | 9 (15.0) | 21 (35.0) | 4 (6.7) |
| Total | 46 (76.7) | 14 (23.3) | 52 (85.0) | 9 (15.0) | 37 (61.7) | 23 (38.3) | 53 (88.3) | 7 (11.7) |
| P value | 0.338 (NS) | 0.289 (NS) | 0.848 (NS) | 0.314 (NS) | ||||