Streptococcal and staphylococcal infection parameters in type I and II psoriasis and four psoriasis subtypes
| Psoriasis type (No of patients/% of total) | Subtypes (No of patients/% of total) | HLA-Cw6/−B57/−B13 (No of patients/% of total) | ||||||
|---|---|---|---|---|---|---|---|---|
| Type I | Type II | Ia | Ib | IIa | IIb | Positive | Negative | |
| *p=0.004 type I v type II. †p=0.04 type Ia v IIa. ‡p=0.002 type Ib v IIa. §p=0.006 type IIb v IIa (two tailed Fisher’s exact test each);.¶p=0.01 HLA positive v negative (chi-square test). | ||||||||
| Total number of subjects | 82 | 14 | 31 | 38 | 14 | 13 | 51 | 45 |
| Streptococcus pyogenes | ||||||||
| ASLO-/ADNAse-B titre >200 IU and/or nasopharyngeal swabbing positive | 32 (39%) | 0 (0%)* | 9 (29%)† | 17 (45%)‡ | 0 (0%) | 6 (46%)§ | 23 (45%) | 9 (20%)¶ |
| Staphylococcus aureus | ||||||||
| ASTA titre >2 IU and/or nasopharyngeal swabbing positive | 33 (40%) | 4 (29%) | 13 (42%) | 15 (39%) | 4 (29%) | 5 (38%) | 20 (39%) | 17 (38%) |