TABLE 1.
S. flexneri strains used in this study
| Strain | Characteristic(s) | Source |
|---|---|---|
| M90T-W | Wild-type S. flexneri serotype 5 | WRAIRa |
| M90T-55 | Plasmid-cured derivative of M90T-W | WRAIR |
| SC403 | Deletion mutant of the ipaB gene in M90T-W | Pasteur Institute |
| 2457T | Wild-type S. flexneri serotype 2a | WRAIR |
| 2457T-str | Streptomycin-resistant derivative of 2457-T | WRAIR |
| M4243A1 | Plasmid-cured derivative of 2457-T | WRAIR |
| pWR700 | ipaH7.8 deletion in 2457-T | WRAIR |
| pWR710 | ipaH4.5 deletion in 2457-T | WRAIR |
| pWR720 | ipaH9.8 insertion mutation in 2457-T | WRAIR |
| pWR730 | ipaH4.5 deletion in pWR700 | WRAIR |
| pWR740 | ipaH9.8 insertion mutant in pWR700 | WRAIR |
| pWR750 | ipaH9.8 insertion mutant in pWR730 | WRAIR |
| pWR701 | pWR700 complemented with ipaH7.8 | WRAIR |
| pWR800 | ipaH7.8 mutation in M90T-W | WRAIR |
a
WRAIR, Walter Reed Army Institute of Research, Washington, D.C.