| Oxacillin screen agar | PCR Results | Total | P value | |
| Positive | Negative | |||
| Resistant | 19 (100.0%) | 2 (66.7%) | 21 (95.5%) | 0.01 |
| Sensitive | 0 (0.0%) | 1 (33.3%) | 1 (4.5%) | |
| Total | 19 (100.0%) | 3 (100.0%) | 22 (100.0%) | |