Analysis of ciprofloxacin-resistant Salmonella strains from swine, chicken, and their carcasses in Taiwan and detection of parC resistance mutations by a mismatch amplification mutation assay PCR

Cheng Chung Lin, Ter Hsin Chen, Yu Chih Wang, Chao Chin Chang, Shih Ling Hsuan, Yi Chih Chang, Kuang Sheng Yeh

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

One hundred thirty-three Salmonella strains isolated from the viscera of swine, chicken, and carcasses of swine and chicken in Taiwan from 2004 to 2006 were identified to serotype level and analyzed for their susceptibility to ciprofloxacin. In total, 76 (57%) strains of the Salmonella isolates exhibited high-level resistance to ciprofloxacin, having MICs ranging from 16 to 64 μg/ml. DNA sequence analysis revealed that mutations in the quinolone resistance-determining regions of gyrA (Ser83Phe, Asp87Gly or Asp87Asn), parC (Ser80Arg, or Ser80Ile or Glu84Lys), and parE (Ser458Pro) genes were associated with the Salmonella strains that demonstrated resistance to ciprofloxacin. A mismatch amplification mutation assay (MAMA)-PCR was developed to identify mutations in parC at codons 80 and 84. Specific PCR products were only recovered from ciprofloxacin-resistant Salmonella strains but not from the susceptible strains. MAMA-PCR targeting the mutations in parC correlated with what DNA sequencing revealed. In conclusion, monitoring ciprofloxacin-resistant Salmonella from animal sources should be performed on a regular basis. MAMA-PCR targeting parC could provide a fast method for those laboratories interested in quickly characterizing the resistance profile and with little access to DNA sequencing facilities.

Original languageEnglish
Pages (from-to)14-20
Number of pages7
JournalJournal of Food Protection
Volume72
Issue number1
Publication statusPublished - Jan 2009

Fingerprint

ciprofloxacin
Ciprofloxacin
Taiwan
Salmonella
Chickens
Swine
chickens
mutation
Polymerase Chain Reaction
Mutation
swine
DNA Sequence Analysis
sequence analysis
chicken carcasses
pig carcasses
quinolones
animal organs
Viscera
codons
Quinolones

ASJC Scopus subject areas

  • Food Science
  • Microbiology

Cite this

Analysis of ciprofloxacin-resistant Salmonella strains from swine, chicken, and their carcasses in Taiwan and detection of parC resistance mutations by a mismatch amplification mutation assay PCR. / Lin, Cheng Chung; Chen, Ter Hsin; Wang, Yu Chih; Chang, Chao Chin; Hsuan, Shih Ling; Chang, Yi Chih; Yeh, Kuang Sheng.

In: Journal of Food Protection, Vol. 72, No. 1, 01.2009, p. 14-20.

Research output: Contribution to journalArticle

Lin, Cheng Chung ; Chen, Ter Hsin ; Wang, Yu Chih ; Chang, Chao Chin ; Hsuan, Shih Ling ; Chang, Yi Chih ; Yeh, Kuang Sheng. / Analysis of ciprofloxacin-resistant Salmonella strains from swine, chicken, and their carcasses in Taiwan and detection of parC resistance mutations by a mismatch amplification mutation assay PCR. In: Journal of Food Protection. 2009 ; Vol. 72, No. 1. pp. 14-20.
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abstract = "One hundred thirty-three Salmonella strains isolated from the viscera of swine, chicken, and carcasses of swine and chicken in Taiwan from 2004 to 2006 were identified to serotype level and analyzed for their susceptibility to ciprofloxacin. In total, 76 (57{\%}) strains of the Salmonella isolates exhibited high-level resistance to ciprofloxacin, having MICs ranging from 16 to 64 μg/ml. DNA sequence analysis revealed that mutations in the quinolone resistance-determining regions of gyrA (Ser83Phe, Asp87Gly or Asp87Asn), parC (Ser80Arg, or Ser80Ile or Glu84Lys), and parE (Ser458Pro) genes were associated with the Salmonella strains that demonstrated resistance to ciprofloxacin. A mismatch amplification mutation assay (MAMA)-PCR was developed to identify mutations in parC at codons 80 and 84. Specific PCR products were only recovered from ciprofloxacin-resistant Salmonella strains but not from the susceptible strains. MAMA-PCR targeting the mutations in parC correlated with what DNA sequencing revealed. In conclusion, monitoring ciprofloxacin-resistant Salmonella from animal sources should be performed on a regular basis. MAMA-PCR targeting parC could provide a fast method for those laboratories interested in quickly characterizing the resistance profile and with little access to DNA sequencing facilities.",
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