101. Antimicrobial resistance in Salmonella serovars isolated from meat shops at the markets in North Vietnam.
- Author
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Thai TH, Lan NT, Hirai T, and Yamaguchi R
- Subjects
- Animals, Chickens, Microbial Sensitivity Tests, Polymerase Chain Reaction, Prevalence, Salmonella genetics, Salmonella isolation & purification, Swine, Vietnam epidemiology, Anti-Bacterial Agents pharmacology, Drug Resistance, Multiple, Bacterial genetics, Meat microbiology, Salmonella drug effects, Salmonella Infections, Animal epidemiology
- Abstract
A total of 97 out of 245 carcass, sewage effluent, and table surface samples in meat shops at the retail markets in North Vietnam showed Salmonella positive. Eleven Salmonella serovars, including Infantis, Anatum, Rissen, Reading, London, Typhimurium, Enteritidis, Agona, Newport, Emek, and Derby, were identified. The Salmonella isolates were tested for antimicrobial susceptibility and further investigated for antimicrobial resistance genes. Resistance to kanamycin, gentamicin, neomycin, nalidixic acid, chloramphenicol, trimethoprim, streptomycin, tetracycline, ampicillin, and sulphonamides was found in 28.9-56.7%. The isolates were neither resistant to ceftazidime nor norfloxacin. Sixty-four (66.0%) out of 97 isolates were resistant to at least one of 14 antimicrobials, and 55 (85.9%) out of the 64 isolates showed multidrug resistance. Thirteen resistance genes (bla(TEM), bla(OXA-1), aadA1, sul1, tetA, tetB, tetG, cmlA1, floR, dfrA1, dfrA12, aac(3)-IV, and aphA1-1AB) were detected in the resistant isolates. This study indicates that Salmonella isolated from meat shops were resistant to multiple antimicrobials, and the resistance genes were widespread among the serovars isolated.
- Published
- 2012
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