Table 4 The frequency of virulence genes among main types of S. aureus isolates and the comparison of two time periods
Virulence genes | S. aureus (n = 227)n(%) | ST398 (n = 32)n(%) | ST188 (n = 30)n(%) | ST45 (n = 23)n(%) | 2013–2014 (n = 91)n(%) | 2018–2019 (n = 136)n(%) | P valuea |
|---|---|---|---|---|---|---|---|
pvl | 108 (47.6) | 26 (81.3) | 11 (36.7) | 4 (17.4) | 25 (27.5) | 83 (61.0) | < 0.01 |
fnbA | 87 (35.7) | 7 (21.9) | 7 (23.3) | 10 (43.5) | 33 (36.3) | 54 (39.7) | 0.601 |
fnbB | 113 (49.8) | 31 (96.9) | 6 (20.0) | 6 (26.1) | 19 (20.9) | 94 (69.1) | < 0.01 |
hla | 224 (98.7) | 32 (100.0) | 29 (96.7) | 23 (100.0) | 91 (100.0) | 133 (97.8) | 0.405 |
hlb | 161 (70.9) | 20 (62.5) | 19 (63.3) | 6 (26.1) | 44 (48.4) | 117 (86.0) | < 0.01 |
sea | 35 (15.4) | 5 (15.6) | 2 (6.7) | 1 (4.3) | 13 (14.3) | 22 (16.2) | 0.699 |
seb | 108 (47.6) | 11 (34.4) | 18 (60.0) | 8 (34.8) | 35 (38.5) | 73 (53.7) | 0.024 |
sec | 63 (27.8) | 2 (6.3) | 5 (16.7) | 22 (95.7) | 28 (30.8) | 35 (25.7) | 0.406 |
eta | 130 (57.3) | 24 (75.0) | 14 (46.7) | 22 (95.7) | 21 (23.1) | 109 (80.1) | < 0.01 |
etb | 43 (18.9) | 10 (31.3) | 6 (20.0) | 3 (13.0) | 0 (0.0) | 43 (31.6) | < 0.01 |
clfA | 227 (100.0) | 32 (100.0) | 30 (100.0) | 23 (100.0) | 91 (100.0) | 136 (100.0) | – |