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Characterization of Toxin Genes and Antimicrobial Susceptibility of Staphylococcus aureus from Retail Raw Chicken

Suixia Li1, Panpan Wang1, Jialin Zhao1

  • 11 College of Food Science and Engineering, Northwest A&F University, Yangling, Shaanxi 712100, People's Republic of China.

Journal of Food Protection
|March 8, 2018
PubMed

Insights

Raw chicken in China harbors Staphylococcus aureus with multiple toxin genes and high antimicrobial resistance. This poses a significant public health risk to consumers due to potential foodborne illnesses.

Area of Science:

  • Food safety and microbiology
  • Antimicrobial resistance
  • Bacterial toxinology

Background:

  • Staphylococcus aureus is a common pathogen found in food products.
  • The presence of toxin genes and antimicrobial resistance in foodborne S. aureus is a growing public health concern.
  • Raw chicken is a potential vehicle for the transmission of pathogenic bacteria to humans.

Purpose of the Study:

  • To investigate the prevalence of toxin genes and antimicrobial resistance patterns in Staphylococcus aureus isolates from raw chicken in China.
  • To identify specific toxin genes and antimicrobial resistance profiles.
  • To assess the potential health risks associated with these S. aureus strains.

Main Methods:

  • Isolation and identification of S. aureus from raw chicken samples.
  • Antimicrobial susceptibility testing using various agents.
  • Polymerase Chain Reaction (PCR) to detect genes encoding enterotoxins, exfoliative toxins, Panton-Valentine leukocidin (pvl), and toxic shock syndrome toxin (tsst-1).

Main Results:

  • 46.0% of S. aureus isolates carried one or more toxin genes, with pvl being the most common (26.6%).
  • Nearly all isolates (99.7%) were resistant to at least one antimicrobial, and 87.2% showed multidrug resistance.
  • High resistance rates were observed for trimethoprim-sulfamethoxazole and erythromycin (86.2% each).

Conclusions:

  • S. aureus strains from raw chicken in China possess a concerning combination of toxin-producing capabilities and extensive antimicrobial resistance.
  • These findings highlight the potential for foodborne transmission of virulent and drug-resistant S. aureus.
  • Effective surveillance and control measures are crucial to mitigate the public health risks associated with contaminated poultry products.
Keywords:
Antimicrobial resistanceRaw chicken meatStaphylococcus aureusToxin genes

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