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Antibiotic Usage Pattern in Broiler Chicken Flocks in Germany.

Svetlana Kasabova1, Maria Hartmann1, Fritjof Freise1

  • 1Department of Biometry, Epidemiology and Information Processing, WHO Collaborating Centre for Research and Training for Health at the Human-Animal-Environment Interface, University of Veterinary Medicine Hannover, Hannover, Germany.

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Summary

This study analyzed antimicrobial use in 2,546 German broiler chicken flocks from 2013-2018. Findings show shifts in antimicrobial classes used and decreased use of critically important antimicrobials.

Keywords:
antimicrobial usebroiler chicken flocksdaily dosetreatment frequencyweight at treatment

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Area of Science:

  • Veterinary Medicine
  • Animal Health
  • Antimicrobial Stewardship

Background:

  • Antimicrobial usage in livestock is a significant concern for public health and animal welfare.
  • Understanding usage patterns is crucial for developing effective antimicrobial stewardship strategies in poultry production.
  • Data from Germany provides insights into trends and practices within commercial broiler farming.

Purpose of the Study:

  • To investigate antibiotic usage patterns in German broiler chicken flocks between 2013 and 2018.
  • To analyze temporal trends in treatment frequency and the proportions of different antimicrobial classes used.
  • To examine the body weight of broiler chickens at the time of antimicrobial treatment.

Main Methods:

  • Retrospective analysis of mandatory antimicrobial usage data from 2,546 broiler flocks across 37 farms in Germany.
  • Data collected for the period 2013-2018, covering the entire fattening period.
  • Analysis included treatment frequency, antimicrobial classes, and broiler body weight at treatment.

Main Results:

  • Median treatment frequency was six times per flock; aminoglycosides and lincosamides were most common (25.6% each).
  • Significant increase in lincosamide and aminoglycoside use, with a decrease in fluoroquinolone, macrolide, and polypeptide use over time.
  • Median broiler weight at treatment (111g) was substantially lower than the ESVAC-proposed standard (1000g), influenced by age-specific diseases.

Conclusions:

  • Antimicrobial use patterns in German broiler flocks show evolving trends, with a notable decrease in the use of highest-priority critically important antimicrobials.
  • The lower median weight at treatment suggests disease patterns influence antimicrobial administration, impacting treatment indicators.
  • Increased awareness of antibiotic resistance and monitoring systems likely contribute to the observed shifts towards more judicious antimicrobial use.