No abstract available
MeSH terms
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Animals
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Antigens, Bacterial* / analysis
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Cell-Free System
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Erythrocytes / immunology
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Escherichia coli / immunology*
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Guinea Pigs / immunology
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Hemagglutination Tests
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Hemagglutination*
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Hemagglutinins / analysis
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Mutation
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Swine
Substances
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Antigens, Bacterial
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Hemagglutinins