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A case-control questionnaire survey of risk factors for porcine reproductive and respiratory syndrome (PRRS) seropositivity in Danish swine herds
Sixty-eight case herds seropositive to porcine reproductive and respiratory syndrome (PRRS) were compared to 128 seronegative controls in a double-blinded questionnaire survey. The study indicated no increased risk of PRRS seropositivity for herds using artificial insemination with semen from PRRS s...
Autores principales: | Mousing, J., Permin, A., Mortensen, S., Bøtner, A., Willeberg, P. |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Published by Elsevier B.V.
1997
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7117460/ https://www.ncbi.nlm.nih.gov/pubmed/9220629 http://dx.doi.org/10.1016/S0378-1135(96)01321-1 |
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