Table 2. Characteristics of Salmonella enterica serovar Enteritidis isolates harboring pUO-SeVR1-like plasmids, 2005–2010, UK*.
| Isolate no. | Phage type | Resistance phenotype/ genotype | Class 1 integron† | pSEV genes‡ | MLVA | MLST | VR plasmid, kb |
|---|---|---|---|---|---|---|---|
| CNM4839/03 | PT 14b | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, srgB, srgC, pefA, pefB, pefC, pefD | 2-12-9-4-4-3-NA-8-8 | ST11 | 100 |
| H051860415 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ST1479 | 95 |
| H070360201 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB | 2-15-9-4-4-3-NA-8-8 | ST1479 | 88 |
| H070420137 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB | 2-15-9-4-4-3-NA-8-8 | ND | 88 |
| H073180204 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ND | 92 |
| H091340084 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB, pefC, pefD | 2-9-9-4-4-3-NA-8-8 | ST11 | 90 |
| H091800482 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ND | 92 |
| H095100307 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ND | 95 |
| H100240198 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ND | 95 |
| H101700366 | PT 42 | AMP, CHL, STR, SUL, TET, TMP/blaTEM-1, catA2, strA-strB, sul1, sul2, tet(A), dfrA7 | 700 bp/dfrA7 | spvA, spvB, spvC, spvR, rsk, rck, mig-5, ΔsrgA, srgB, srgC, pefA, pefB, pefC, pefD | 2-13-9-4-4-3-NA-8-8 | ND | 95 |
*pSEV, serovar-specific V plasmid of S.enterica serovar Enteritidis; MLVA, multilocus variable number tandem repeat analysis; MLST, multilocus sequence typing; VR, virulence-resistance; PT, phage type; NA, no amplification from this locus; AMP, ampicillin; CHL, chloramphenicol; STR streptomycin; SUL, sulfonamides; TET, tetracycline; TMP, trimethoprim; ST, sequence type; ND, not done. †Size of the variable region amplified with the 5′CS and 3′CS primers (2). ‡All plasmids were positive for IncFIIA, IncFIB and the par locus. Two new primer pairs were devised for detection of srgA: srgAB-Fw1/Rv1 (5′-CGCCTTCCGTGTATGTCC/GCGAGTCACTCACCGACAG-3′) and srgAB-Fw2/Rv2 (5′-GTTGCACAGGAGTGGGAGTC/GTCCGGGTTCCATGTCAG-3′). The forward primers anneal at different positions within srgA; the reverse primers anneal at different positions within srgB.