Table 5 Stability of antibiotic markers in the five double-recombinant Salmonella -EGFP strains
  Strains | Origin 1 | Detection rate for antibioticmarker 1 (%) | Origin 2 | Detection rate for antibioticmarker 2 (%) | Combined detection rate forantibiotic markers (%) |
|---|---|---|---|---|---|
CP + HP | Chromosome-based | 100.0 | p UC | 0.8 | 0.8 |
CP + LP | Chromosome-based | 100.0 | p 15A | 100 | 100.0 |
CP + HO | Chromosome-based | 100.0 | p UC | 60.0 | 60.0 |
  CP + E | Chromosome-based | 100.0 | p UC | 100.0 | 100.0 |
  E + LP | pUC | 50.0 | p 15A | 100.0 | 50.0 |