Polynucleic acids isolated from a porcine reproductive and...

Details Polynucleic acids isolated from a porcine reproductive and... Polynucleic acids isolated from a porcine reproductive and...

2007-09-04

2007-09-04

Campell, Bruce R. (Department: 1648)

Chemistry: molecular biology and microbiology

Virus or bacteriophage, except for viral vector or...

Reexamination Certificate

active

10618779

ABSTRACT:
The present invention provides a purified preparation containing a polynucleic acid encoding at least one polypeptide selected from the group consisting of proteins encoded by one or more open reading frames (ORF's) of an Iowa strain of porcine reproductive and respiratory syndrome virus (PRRSV), proteins at least 80% but less than 100% homologous with those encoded by one or more of ORF 2, ORF 3, ORF 4 and ORF 5 of an Iowa strain of PRRSV, proteins at least 97% but less than 100% homologous with proteins encoded by one or both of ORF 6 and ORF 7 of an Iowa strain of PRRSV, antigenic regions of such proteins which are at least 5 amino acids in length and which effectively stimulate immunological protection in a porcine host against a subsequent challenge with a PRRSV isolate, and combinations thereof, in which amino acids non-essential for antigenicity may be conservatively substituted. The present invention also concerns a polypeptide encoded by such a polynucleic acid; a vaccine comprising an effective amount of such a polynucleic acid or protein; antibodies which specifically bind to such a polynucleic acid or protein; methods of producing the same; and methods of raising an effective immunological response against a PRRSV, treating a pig infected by a PRRSV, and detecting a PRRSV.

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