Document Detail

Antimicrobial resistance in bacteria from Swiss veal calves at slaughter.
MedLine Citation:
PMID:  18035972     Owner:  NLM     Status:  MEDLINE    
Bacteria with antimicrobial resistance can be transferred from animals to humans and may compromise antimicrobial treatment in case of infection. To determine the antimicrobial resistance situation in bacteria from Swiss veal calves, faecal samples from 500 randomly selected calves originating from 129 farms were collected at four big slaughterhouses. Samples were cultured for Escherichia coli, Enterococcus sp. and Campylobacter sp. and isolated strains were tested for antimicrobial susceptibility to selected antimicrobial agents by the minimal inhibitory concentration technique using the broth microdilution method. From 100 farms, data on farm management, animal husbandry and antimicrobial treatments of the calves were collected by questionnaire. Risk factors associated with antimicrobial resistance were identified by logistic regression. In total, 467 E. coli, 413 Enterococcus sp. and 202 Campylobacter sp. were isolated. Of those, 68.7%, 98.7% and 67.8%, respectively, were resistant to at least one of the tested antimicrobial agents. Resistance was mainly observed to antimicrobials frequently used in farm animals. Prevalence of resistance to antimicrobials important for human treatment was generally low. However, a rather high number of quinupristin/dalfopristin-resistant Enterococcus faecium and ciprofloxacin-resistant Campylobacter sp. were detected. External calf purchase, large finishing groups, feeding of milk by-products and administration of antimicrobials through feed upon arrival of the animals on the farm significantly increased the risk of antimicrobial resistance at farm level. Participation in a quality assurance programme and injection of a macrolide upon arrival of the animals on the farm had a protective effect. The present study showed that veal calves may serve as a reservoir for resistant bacteria. To ensure food safety, veal calves should be included in the national monitoring programme for antimicrobial resistance in farm animals. By improving farm management and calf husbandry the prevalence of resistance may be reduced.
E Di Labio; G Regula; A Steiner; R Miserez; A Thomann; U Ledergerber
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Zoonoses and public health     Volume:  54     ISSN:  1863-1959     ISO Abbreviation:  Zoonoses Public Health     Publication Date:  2007  
Date Detail:
Created Date:  2007-11-26     Completed Date:  2008-02-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101300786     Medline TA:  Zoonoses Public Health     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  344-52     Citation Subset:  IM    
Federal Veterinary Office, Schwarzenburgstrasse 155, 3003 Bern, Switzerland.
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MeSH Terms
Animals, Newborn
Campylobacter / drug effects*,  isolation & purification
Cattle / microbiology*
Colony Count, Microbial
Disease Reservoirs / microbiology,  veterinary
Dose-Response Relationship, Drug
Drug Resistance, Bacterial*
Drug Resistance, Multiple, Bacterial
Enterococcus / drug effects*,  isolation & purification
Escherichia coli / drug effects*,  isolation & purification
Feces / microbiology*
Logistic Models
Microbial Sensitivity Tests / veterinary
Public Health
Risk Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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