No abstract available
MeSH terms
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Animals
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Anti-Bacterial Agents / pharmacology
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Antigens, Bacterial / analysis*
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Cattle / microbiology*
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Disease Reservoirs
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Drug Resistance, Microbial*
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England
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Escherichia coli / drug effects
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Escherichia coli / immunology*
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Humans
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R Factors*
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Rectum / microbiology
Substances
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Anti-Bacterial Agents
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Antigens, Bacterial