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Related Experiment Videos

Antibiotic resistance in animals.

Mary D Barton1, Rachael Pratt, Wendy S Hart

  • 1School of Pharmaceutical, Molecular and Biomedical Sciences, University of South Australia, Adelaide, South Australia. mary.barton@unisa.edu.au

Communicable Diseases Intelligence Quarterly Report
|June 17, 2003
PubMed
Summary

Australian animal antibiotic resistance is poorly monitored, with limited drug registration. Early surveys found some resistance in bacteria like E. coli and Salmonella, but no fluoroquinolone resistance.

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Area of Science:

  • Veterinary microbiology
  • Antimicrobial resistance surveillance

Background:

  • Systematic surveillance of antibiotic resistance in Australian animals is lacking.
  • Antibiotic registration for animal use is conservative; fluoroquinolones are not approved for food animals.

Purpose of the Study:

  • To review existing data on antibiotic resistance in Australian animal pathogens.
  • To identify trends and gaps in antimicrobial resistance monitoring.

Main Methods:

  • Analysis of historical survey data (late 1970s) on Salmonella, E. coli, and Staphylococcus aureus from livestock.
  • Review of published case reports and data prior to avoparcin withdrawal.

Main Results:

  • Vancomycin resistance (vanA) detected in Enterococcus from chickens, not pigs, pre-avoparcin withdrawal. Virginiamycin resistance was common in pig and poultry isolates.

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  • Multiple drug resistance was prevalent in E. coli and Salmonella. No fluoroquinolone resistance found in key bacterial groups.
  • Beta-lactamase production common in bovine mastitis isolates; methicillin resistance absent in cattle but reported in canine Staphylococcus intermedius. ESBL-producing E. coli found in dogs.
  • Conclusions:

    • Limited historical data suggests varying resistance patterns in Australian animals, with notable exceptions like fluoroquinolone susceptibility.
    • The lack of systematic surveillance hinders effective monitoring of antimicrobial resistance in food-producing and companion animals.