TABLE 2.
Positive and negative predictive values of each of the key alleles chosen as being diagnostic for Salmonella isolates of the five major serovars in the United Kingdom
| Serovar | No. of STs per MLST database | Key allele (%)a | Positive predictive value (%) | Negative predictive value (%) |
|---|---|---|---|---|
| Typhimurium | 29 | hemD12 (86.2) | 0.925 (92.5) | 0.993 (99.3) |
| Enteritidis | 15 | thrA11 (53.3) | 0.615 (61.5) | 0.988 (98.8) |
| Virchow | 12 | thrA14 (81.8) | 0.692 (69.2) | 0.995 (99.5) |
| Infantis | 8 | sucA21 (75) | 1.0 (100) | 0.996 (99.6) |
| Braenderup | 3 | purE11 (100) | 1.0 (100) | 1.0 (100) |
a
The values shown in parentheses indicate the percentage of STs for each serovar that are represented by the chosen key allele in the MLST database.