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Title of the publicationAntimicrobial resistance in Campylobacter strains isolated from French broilers before and after antimicrobial growth promoter bans
Abstract

Objectives: The antimicrobial susceptibility of Campylobacter strains isolated from standard and freerange broilers in 1992–1996 and 2001–2002 was studied.
Methods: Strains were isolated from caeca or skin samples collected from standard or free-range broilers arriving in slaughterhouses. The MICs of ampicillin, nalidixic acid, enrofloxacin, tetracycline, erythromycin and gentamicin were determined by agar dilution and compared according to species (Campylobacter jejuni or Campylobacter coli), production system and sampling period.
Results: Results showed that all chickens harboured Campylobacter. An increase over time of the C. coli/C. jejuni ratio for standard chickens occurred. A wide range of MICs was observed among isolates from the same broiler or from the same farm. Strains collected on entry to the slaughterhouse and after storage showed no significant difference in their antibiotic resistance. C. coli was more resistant than C. jejuni to tetracycline and erythromycin during the first period and to all tested molecules (except gentamicin) during the second period. Strains isolated from standard chickens were also more often resistant than those isolated from free-range broilers. The percentage of C. jejuni strains resistant to ampicillin decreased from 1992–1996 to 2001–2002, whereas no change could be observed for the other antimicrobial agents. However, for C. coli the resistance to ampicillin, nalidixic acid, enrofloxacin, tetracycline and erythromycin significantly increased.
Conclusion: There was an increase in the incidence of antibiotic resistance of C. coli between 1992–1996 and 2001–2002.

DOIhttps://doi.org/10.1093/jac/dkh473
Name of the first authorDesmonts, Marie-Hélène
Year of publication2004
Study design of the publicationTime-series analysis
Method for data collection and analysis
  • Quantitative data - Quantitative data were used during the intervention
Quantitative data - Quantitative data were used during the intervention
Other references about the intervention or other assessment of the intervention

European Economic Community. (1998). Council Regulation (EC) No 2821/98 of 17 December 1998 on authorisation ban of certain antibiotics concerning the additives in animals food. Official Journal of European Communities L351/4.

Sector
  • Animal - All activities regarding living animals
Sub-sectorSub-sectors are further units of demarcation within a sector E.g. awareness campaign from veterinarians to cat owners about toxoplasmosis drug resistance and transmission of resistant bacteria: ANIMAL, PETS
Subsector (animal)
  • Livestock - Places were terrestrial animals are farmed including farms, fields, orchards, pastures