Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

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, wherein the polynucleotide molecule lacks at least one detectable antigenic epitope of North American PRRS virus. The invention also provides vaccines comprising genetically modified North American PRRS virus, RNA molecules, plasmids and viral vectors comprising the isolated polynucleotide molecules. Also provided are isolated polynucleotide molecules further comprising at least one nucleotide sequence that encodes a detectable heterologous antigenic epitope, and vaccines comprising North American PRRS virus, RNA molecules, plasmids and viral vectors comprising such isolated polynucleotide molecules.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.

Abstract: The invention provides isolated polynucleotide molecules, including plasmids; viral vectors; and transfected host cells that comprise a DNA sequence encoding an infectious RNA sequence encoding a North American PRRS virus; and also North American PRRS viruses encoded thereby. The invention further provides isolated infectious RNA molecules encoding a North American PRRS virus. The invention also provides isolated polynucleotide molecules, infectious RNA molecules, viral vectors, and transfected host cells encoding genetically-modified North American PRRS viruses; and genetically-modified North American PRRS viruses encoded thereby. The invention also provides vaccines comprising such plasmids, RNA molecules, viral vectors, and North American PRRS viruses, and methods of using these vaccines in swine and in other animals. Also provided are isolated polynucleotide molecules, viral vectors, and transfected host cells that comprise a nucleotide sequence encoding a peptide of a North American PRRS virus.