Dear colleagues with passion for PRRS. To update you regularly on the latest scientific and practical aspects in Disease Control and Management with focus on PRRS, we have created a very comprehensive guide book called Content Compass.
Examination of lung lesions at slaughterhouses provides important information regarding swine respiratory disease presence in farms worldwide.
Thyroid hormones are powerful regulators of growth, development and basal metabolic rate and can be dysregulated under conditions of severe stress or illness.
Accounting for multiple modes of livestock disease dissemination in epidemiological models remains a challenge.
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The hypothesis that feed ingredients could serve as vehicles for the transport and transmission of viral pathogens was first validated under laboratory conditions. To bridge the gap from the laboratory to the field, this current project tested whether three significant viruses of swine could survive in feed ingredients during long- distance commercial transport across the continental US. One- metric tonne totes of soybean meal (organic and conventional) and complete feed were spiked with a 10 ml mixture of PRRSV 174, PEDV and SVA and transported for 23 days in a commercial semi- trailer truck, crossing 29 states, and 10,183 km. Samples were tested for the presence of viral RNA by PCR, and for viable virus in soy- based samples by swine bioassay and in complete feed samples by natural feeding. Viable PRRSV, PEDV and SVA were detected in both soy products and viable PEDV and SVA in complete feed. These results provide the first evidence that viral pathogens of pigs can survive in representative volumes of feed and feed ingredients during long- distance commer-cial transport across the continental United States.