TABLE 2 .
Characteristics of strains used in the study
| Strain | Serotype | Relevant characteristic(s) | Reference |
|---|---|---|---|
| D39 | 2 | Wild-type Avery strain | 11 |
| D39-C08P2 | 2 | D39 with chromosomal insertion of Ermr cassette, equally as virulent as D39 |
92 |
| Rx1 | Acapsular | Hypercompetent rough D39 derivative | 93 |
| AM1000 | Acapsular | Unencapsulated D39 derivative | 84 |
| JD908 | Acapsular | Unencapsulated WU2 (serotype 3) derivative, Ermr | 94 |
| TRE121 | 2 | D39 ΔpspA ΔpspC Ermr Tetr | 63 |
| HT6 | 3 | WU2 with chromosomal Ermr | 95 |
| SP670 | 6B | Clinical Penr isolate | 96 |
| SP456 | 23F | Clinical Penr isolate | 96 |
| STM68 | 4 | TIGR4 with Cmr transposon insertion | 97 |
| EF3030 | 19F | Clinical isolate | 98 |