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Recovery of antimicrobial-resistant Escherichia coli after storage of bovine feces in Cary-Blair medium

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The effect of storing bovine feces in Cary-Blair medium on the recovery of antimicrobial-resistant Escherichia coli was investigated. Feces from cattle at a research feedlot (n = 50) and at a commercial feedlot (n = 46) were processed immediately or after storage in Cary-Blair medium for 8 days at 5 °C. Total, ampicillin-resistant, and tetracycline-resistant E. coli were isolated. The number of total E. coli decreased slightly after storage (0.19 log units; p < 0.001), but storage of feces in Cary-Blair medium did not affect recovery of ampicillin- or tetracycline-resistant E. coli.

L’effet de l’entreposage de matières fécales bovines dans le milieu Cary-Blair sur la récupération d’Escherichia coli résistant aux antimicrobiens a été étudié. Les fèces de bovins élevés dans un parc d’engraissement expérimental (n = 50) ou dans un parc d’engraissement commercial (n = 46) ont été traitées immédiatement ou entreposées dans le milieu Cary-Blair pendant 8 jours à 5 °C. Les bactéries E. coli totales, résistantes à l’ampicilline et résistantes à la tétracycline ont été isolées. Le nombre total d’E. coli a légèrement diminué après l’entreposage (0.19 unités log; p < 0,001), mais l’entreposage des fèces dans le milieu Cary-Blair n’a pas affecté la récupération d’E. coli résistants à l’amplicilline ou à la tétracycline.

Document Type: Research Article

Publication date: October 1, 2009

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  • Published since 1954, this monthly journal contains new research in the field of microbiology including applied microbiology and biotechnology; microbial structure and function; fungi and other eucaryotic protists; infection and immunity; microbial ecology; physiology, metabolism and enzymology; and virology, genetics, and molecular biology. It also publishes review articles and notes on an occasional basis, contributed by recognized scientists worldwide.
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