Prevalence of salmonellae and their resistance to antibiotics in slaughtered pigs in the Czech Republic
Sisak, F.(Vyzkumny Ustav Veterinarniho Lekarstvi, Brno (Czech Republic))E-mail:[email protected] | Havlickova, H. | Karpiskova, R. | Rychlik, I.
Salmonella prevalence in 816 slaughtered pigs was evaluated and the resistance of the isolates to 14 antibiotics was determined. Salmonella prevalence in the pigs depended on the origin of the particular herd. Salmonella detected in caecum (2.45%) was the major potential source of pork contamination in comparison with mesenteric lymph nodes, carcass swabs, and environment. Salmonella isolates were classified as follows: S. infantis (n=8), S. typhimurium (n=5), S. agona (n=4), S. kaapstad (n=4), S. derby (n=3), S. bredeney (n=2) and S. london (n=1). All 5 S. typhimurium DT 104 isolates possessed the resistant phenotype ACSSuT. Resistance genes blaPSE-1, floR, aadA2, sul1 and tetG were identified in all pentaresistant strains. One strain of S. derby was resistant to gentamicin, streptomycin and sulphonamides; the other Salmonella isolates were sensitive to all antibiotics tested.
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