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- Salmonella enterica subsp. enterica serovar 4,[5],12:i:- str. CVM23701
- Salmonella enterica subsp. enterica serovar Agona str. SL483
- Salmonella enterica subsp. enterica serovar Dublin str. CT_02021853
- Salmonella enterica subsp. enterica serovar Hadar str. RI_05P066
- Salmonella enterica subsp. enterica serovar Heidelberg str. SL476
- Salmonella enterica subsp. enterica serovar Heidelberg str. SL486
- Salmonella enterica subsp. enterica serovar Javiana str. GA_MM04042433
- Salmonella enterica subsp. enterica serovar Kentucky str. CDC 191
- Salmonella enterica subsp. enterica serovar Kentucky str. CVM29188
- Salmonella enterica subsp. enterica serovar Newport str. SL254
- Salmonella enterica subsp. enterica serovar Newport str. SL317
- Salmonella enterica subsp. enterica serovar Saintpaul str. SARA23
- Salmonella enterica subsp. enterica serovar Saintpaul str. SARA29
- Salmonella enterica subsp. enterica serovar Schwarzengrund str. CVM19633
- Salmonella enterica subsp. enterica serovar Schwarzengrund str. SL480
- Salmonella enterica subsp. enterica serovar Virchow str. SL491
- Salmonella enterica subsp. enterica serovar Weltevreden str. HI_N05-537
Salmonella enterica subsp. enterica serovar Newport str. SL317
S. Newport is prevalent in many geographic regions. Outbreak investigations and targeted studies have identified dairy cattle as the main reservoir of S. Newport. Antimicrobial resistance (Newport MDR-AmpC) is particularly problematic in this serotype, where the prevalence of Newport MDR-AmpC among S. Newport isolates from humans in the United States increased from 0% during 1996-1997 to 26% in 2001. MDR strains of S. Newport have been recorded as resistant to ampicillin, chloramphenicol, streptomycin, sulphonamides and tetracycline (ACSSuT) and many of these strains show intermediate or full resistance to third-generation cephalosporins, kanamycin, potentiated sulphonamides, and gentamicin. Two distinct evolutionary lineages exist in this serotype; antibiotic susceptible strain SL317 is from one lineage, while MDR strain SL254 is from the other.