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Genetic characterization of glycopeptide-resistant enterococci of human and animal origin from mixed pig and poultry farms

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Jensen LB, Willems RJL, van den Bogaard AE. Genetic characterization of glycopeptide-resistant enterococci of human and animal origin from mixed pig and poultry farms. APMIS 2003;111:669–72.

Glycopeptide resistant enterococci (GRE) isolated from animals and humans were characterised using both AFPL typing and genetic characterisation of the glycopeptide resistance transposon Tn1546. All isolates were collected in 1997 when the glycopeptide avoparcin was still being used as growth promoter. All investigated animal isolates were from mixed pig and poultry farms in the Netherlands and the human isolated from the farmers of these farms. A total of 24 isolates were investigated. AFLP and Tn1546 typing revealed that both pig and poultry related enterococcal and vanA transposon genotypes were found among the human isolates indicating spread of glycopeptide resistance from both pig and poultry to the farmers. These findings contradict previous finding that showed that GRE recovered from the general population were genotypically undistinguishable from GRE isolated from pigs but are in line with other studies that demonstrated spread of GRE from poultry to farmers in poultry farms.

Keywords: Enterococcus; GRE; genotyping; spread of resistance

Document Type: Research Article

DOI: http://dx.doi.org/10.1034/j.1600-0463.2003.1110610.x

Affiliations: 1: Section for Antimicrobial Resistance and Environmental Microbiology, Danish Veterinary Laboratory, Copenhagen, Denmark, 2: Diagnostic Laboratory for Infectious Diseases and Perinatal Screening, National Institute for Public Health and the Environment, Bilthoven and 3: Laboratory of Medical Microbiology, University of Maastricht, Maastricht, The Netherlands.

Publication date: June 1, 2003

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