Table 4.
Microbiological diagnosis in non-purulent (n = 131) and purulent cellulitis (n = 80) cases
| All (n = 211) | Non-purulent group (n = 131) | Purulent group (n = 80) | P-value | |
|---|---|---|---|---|
| β-Hemolytic streptococci (%) | 96 (45.5) | 92 (70.2) | 4 (5.0) | <0.001 |
| Staphylococcus aureus a (%) | 64 (30.3) | 16 (12.2) | 48 (60.0) | <0.001 |
| MRSAb (%) | 32 (15.2) | 8 (6.1) | 24 (30.0) | <0.001 |
| CA-MRSAc (%) | 22 (10.4) | 5 (3.8) | 17 (21.3) | 0.681 |
| GNB (%) | 23 (10.9) | 13 (9.9) | 10 (12.5) | 0.441 |
| Polymicrobial pathogens (%) | 21 (10.0) | 6 (4.6) | 15 (18.8) | 0.001 |
Data are number (%) of patients, unless otherwise indicated
CA-MRSA community-associated methicillin-resistant Staphylococcus aureus, GNB Gram-negative bacilli
aIncluding methicillin-susceptible S. aureus and methicillin-resistant S. aureus
bIncluding CA-MRSA and non-CA-MRSA
cDefined by epidemiological criteria [17–19], not by genotypic criteria