<style face="normal" font="default" size="100%">Transmission and infectious dose of Escherichia coli O157:H7 in swine</style>

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31<style face="normal" font="default" size="100%">Transmission and infectious dose of Escherichia coli O157:H7 in swine</style><style face="normal" font="default" size="100%">Transmission and infectious dose of Escherichia coli O157:H7 in swine</style>