Table 2.
ELISA data on in vitro PVL production among clinical isolates of lukSF-PV+ MRSA (n = 51).
| Group | Number of isolates (n) | PVL range (μg/mL) | PVL median (μg/mL) | PVL mean ± SD (μg/mL) | P value |
|---|---|---|---|---|---|
| Clonal complex (CC) | |||||
| Isolates belonging to CC59 | 34 | 0.94−360.87 | 80.75 | 107.67 ± 91.92 | NA |
| Isolates belonging to CC22 | 5 | 0.94−254.62 | 118.51 | 116.88 ± 75.98 | NA |
| Isolates belonging to CC88 | 3 | 0.43−68.47 | 6.53 | 25.14 ± 37.64 | NA |
| Isolates belonging to CC1 | 3 | 13.65−145.32 | 59.91 | 72.96 ± 66.80 | NA |
| Isolates belonging to CC5 | 4 | 14.67−88.38 | 40.85 | 46.18 ± 33.72 | NA |
| Isolates belonging to CC9 | 1 | NA | |||
| Isolates belonging to CC30 | 1 | NA | |||
| Type of infection | |||||
| Isolates from SSTI | 19 | 23.31−360.87 | 113.63 | 126.58 ± 90.67 | 0.151 |
| Isolates from pneumonia | 16 | 0.94−254.62 | 66.27 | 72.11 ± 64.58 | |
| Isolates from surgical site infection | 5 | 3.48−128.27 | 47.72 | 59.55 ± 55.11 | |
| Isolates from other infection | 11 | 0.43−339.52 | 75.79 | 98.34 ± 102.79 | |
| CA isolates | 29 | 0.43−360.87 | 68.47 | 105.2 ± 96.6 | 0.754 |
| HA isolates | 22 | 0.94−265.80 | 87.58 | 86.8 ± 68.8 | |
| Isoform of PVL | |||||
| H isoform isolates | 46 | 0.43−360.87 | 80.75 | 96.91 ± 86.41 | 0.975 |
| R isoform isolates | 5 | 23.82−231.74 | 68.47 | 96.09 ± 80.40 | |
CA, Community-associated infection; HA, hospital-associated infection; NA, not applicable for the Kruska–Wallis rank-sum test due to a relatively small number of isolates; PVL, Panton–Valentine leukocidin; SD, standard deviation; SSTI, skin and soft tissue infection.