Urine from treated cattle drives selection for cephalosporin resistant Escherichia coli in soil. by Murugan Subbiah, Devendra H Shah, Thomas E Besser, Jeffrey L Ullman, Douglas R Call

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Use of exposure history to identify patterns of immunity to pneumonia in bighorn sheep (Ovis canadensis). by Raina K Plowright, Kezia Manlove, E Frances Cassirer, Paul C Cross, Thomas E Besser, Peter J Hudson

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Host vs. pathogen evolutionary arms race: Effects of exposure history on individual response to a genetically diverse pathogen by Daniel P. Walsh, Brandi L. Felts, Brandi L. Felts, E. Frances Cassirer, Thomas E. Besser, Jonathan A. Jenks

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Causes of Pneumonia Epizootics among Bighorn Sheep, Western United States, 2008–2010 by Thomas E. Besser, Margaret A. Highland, Katherine Baker, E. Frances Cassirer, Neil J. Anderson, Jennifer M. Ramsey, Kristin Mansfield, Darren L. Bruning, Peregrine Wolff, Joshua B. Smith, Jonathan A. Jenks

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Concordance in diagnostic testing for respiratory pathogens of bighorn sheep by Daniel P. Walsh, E. Frances Cassirer, Michael D. Bonds, Daniel R. Brown, William H. Edwards, Glen C. Weiser, Mark L. Drew, Robert E. Briggs, Karen A. Fox, Michael W. Miller, Sudarvili Shanthalingam, Subramaniam Srikumaran, Thomas E. Besser

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