Abstract: The invention provides isolated polynucleotide molecules that comprise a DNA sequence encoding an infectious RNA sequence encoding a genetically-modified North American PRRS virus, methods to make it and related polypeptides, polynucleotides, and various components. Vaccines comprising the genetically modified virus and polynucleotides and a diagnostic kit to distinguish between naturally infected and vaccinated animals are also provided.

Abstract: A forced heated air dryer for dental/medical instruments may be used to dry instruments prior to sterilization to prevent water corrosion and the discoloration of instruments. The dryer may also be used to dry damp instruments after the sterilization process to ensure the instruments and packaging are dry prior to storage. This may prevent corrosion and discoloration of instruments between usages. The dryer may allow a medical/dental office to dry their instruments in a single automated step not combined with washing, providing for an economical, efficient and safe solution to dry instruments.