No abstract available
MeSH terms
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Ampicillin / pharmacology
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Animals
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Chloramphenicol / pharmacology
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Escherichia coli* / drug effects
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Feces / microbiology
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Genetics, Microbial
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Germ-Free Life*
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Kanamycin / pharmacology
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Microbial Sensitivity Tests
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Nalidixic Acid / pharmacology
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Penicillin Resistance*
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Streptomycin / pharmacology
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Sulfadimethoxine / pharmacology
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Swine
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Tetracycline / pharmacology
Substances
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Sulfadimethoxine
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Nalidixic Acid
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Kanamycin
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Chloramphenicol
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Ampicillin
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Tetracycline
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Streptomycin