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Intersucking, i.e. sub-adult or adult cattle sucking at the udder of herd-members, is a problem often reported in dairy herds that leads to udder health problems. The causes of intersucking are virtually unknown, and until now all available countermeasures treat only the symptoms of this behavioural problem. We examined (I) whether intersucking occurs prior to weaning and continues thereafter, and...
We compared the protection afforded by three different DNA application methods against bovine respiratory syncytial virus (BRSV) infection in cattle. A synthetic gene that codes for the G protein of BRSV was inserted into a eukaryotic vector and was used in the vaccine. Intradermal (i.d.) application with a needleless injector (NI), the Pigjet TM , reduced BRSV excretion significantly...
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