No abstract available
MeSH terms
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Adult
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Animal Husbandry*
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Animals
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Antibodies, Bacterial / isolation & purification*
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Brucella abortus / immunology*
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Cattle
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Chlamydia / immunology*
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Female
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Humans
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Leptospira / immunology*
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Listeria monocytogenes / immunology*
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Male
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Middle Aged
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Occupational Medicine*
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Poland
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Sheep
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Swine