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To investigate the frequency of tetracycline resistance (Tet-R) lactobacilli in pig intestines, a total of 256 pig colons were analyzed and found to contain typical colonies of Tet-R lactic acid bacteria in every sample, ranging from 3.2 × 10 3 to 6.6 × 10 5 CFU/cm 2 . From these samples, a total of 159 isolates of Tet-R lactobacilli were obtained and identified as belonging...
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