PMID: 11911595Mar 26, 2002Paper

Escherichia coli isolates from young calves in Bavaria: in vitro susceptibilities to 14 anti-microbial agents

Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health
C WerckenthinO R Kaaden

Abstract

During the occasional testing of Escherichia coli from faecal samples of young calves we observed multi-resistant isolates. Because of the significance of E. coli as an indicator bacterium for resistance trends we tested E. coli populations of young calves over a longer period. Here we present the results of a retrospective study comparing isolates from 1998 to 2000. Moreover, we compared, in a clinical study, the resistance rates of E. coli populations from 67 hospitalized calves both before and after hospitalization (with or without anti-microbial therapy), and with their anamnestic data of antibiotic usage. The highest resistance rates were found to be more than 80% for tetracyclines, ampicillin, sulfonamide/trimethoprim combinations, and chloramphenicol. A significant increase or decrease over the years was not observed. In analysing the data of hospitalized calves, an increase of resistance to some anti-microbials had to be registered that seemed to be connected with the selective pressure due to agents used in the clinic. In comparing anamnestic data and resistance rates it became obvious that reliable data are not easily available and that a number of potential anti-microbial influence factors have to be taken into account.

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Citations

Jun 6, 2006·Applied and Environmental Microbiology·Sarah C DonaldsonBhushan M Jayarao
Nov 5, 2005·Applied and Environmental Microbiology·Deborah V HoyleSebastian G B Amyes
Oct 2, 2004·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·M BlickwedeS Schwarz
Apr 5, 2003·Journal of Veterinary Medicine. B, Infectious Diseases and Veterinary Public Health·D E WaturangiW Erdelen
Jun 14, 2013·The Journal of Antimicrobial Chemotherapy·Joost HordijkJaap A Wagenaar
Aug 1, 2009·Foodborne Pathogens and Disease·Ranjana SharmaKaren A Beauchemin
Jul 22, 2014·Magnetic Resonance in Medicine : Official Journal of the Society of Magnetic Resonance in Medicine·Yi Wang, Tian Liu

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