TABLE 1.
Streptococcal strains used in this study
| Strain | Descriptiona | Abbreviation | Source or reference |
|---|---|---|---|
| MGAS166 | M1 clinical isolate with spontaneous Strr | 27 | |
| UMAA2392 | MGAS166 ΔcsrRS (441-bp in-frame deletion of csrR with a spontaneous mutation of the CsrS initiation codon from ATG to ACG) | RS | 12 |
| UMAA2526 | ΔcsrRS ΔhasAB | 12 | |
| UMAA2630 | MGAS166 ΔhasAB | This study | |
| UMAA2820 | MGAS166 ΔsagA | This study | |
| UMAA2840 | ΔcsrRS ΔsagA | RSA | This study |
| UMAA3268 | ΔcsrRS speB::Ωkm-2 | RSB | This study |
| UMAA3136 | ΔcsrRS ΔsagA, speB::Ωkm-2 | RSAB | This study |
| UMAA2966 | ΔcsrRS ΔhasAB, ΔsagA | This study |
a
Strr, streptomycin resistance.