TABLE 2.
Bacteriophage-mediated cotransduction frequency assay shows that spx is essential in three S. aureus strain backgrounds
| Strain | Background | Cotransduction frequency (no. of Δspx ermC colonies/total no. of ermC colonies tested) | P valuea |
|---|---|---|---|
| AR1089 | 8325-4 | 0/26 | <0.001 |
| CB1348 | AR1089 geh::pCL25spx+ | 21/30 | |
| ISP794 | NCTC8325 derivative | 0/20 | <0.001 |
| DA500 | ISP794 geh::pCL25spx+ | 10/20 | |
| Newman | Clinical strain | 0/12 | <0.001 |
| DA600 | Newman geh::pCL25spx+ | 6/12 |
a
Exact binomial test. Data are compiled from at least 3 independent experiments.