TABLE 2.
Additional markers for differentiating specific serotypes and variants
| Target serotype(s) | Marker | Description | Reference or source |
|---|---|---|---|
| S. Paratyphi B pathotypes | SNP in STM3356 | STM3356 is required for tartrate fermentation; an SNP that inactivates this gene is found in commonly circulating typhoidal pathotype strains | Malorny et al. (29) |
| S. Enteritidis | sdf gene | sdf is found in commonly circulating strains of S. Enteritidis but not in S. Gallinarum | Agron et al. (3) |
| O5− strains of Salmonella serotype Typhimurium | Deletion in oafA | 7-bp deletion in gene responsible for O5− phenotype | Hauser et al. (16) |
| Serogroup O13 serotypes | galE | Different alleles appear to be markers for ancillary O22 (NCBI accession no. NZ_LS483489) and O23 (accession no. NZ_CP029041) | This study |