Clinical symptoms in 116 children with B pertussis and 64 children with B parapertussis infection
| B pertussis n=116 (64%) | B parapertussis n=64 (36%) | p value | |
|---|---|---|---|
| Cough >42 days | 74 (64%) | 24 (38%) | 0.0007 |
| Paroxysmal cough | 87 (75%) | 39 (61%) | 0.049 |
| Paroxysm >21 days | 62 (53%) | 14 (22%) | 0.0001 |
| Whooping | 63 (54%) | 19 (30%) | 0.0015 |
| Whooping >21 days | 26 (22%) | 3 (5%) | 0.002 |
| Vomiting | 58 (50%) | 16 (25%) | 0.0011 |
| Vomiting >21 days | 9 (8%) | 0 (0%) | 0.0276 |