Genus, Inc.

William Thomas Christianson

Andrew Mark Cigan

Matthew Scott Culbertson

Benjamin Beaton

Brian Burger

Dylan Barnes

Matthew Campbell

The present disclosure relates to methods and compositions useful for prevention of porcine reproductive and respiratory syndrome virus (PRRSv) in animals, including animals of the species. The present teachings relate to swine wherein at least one allele of a CD163 gene has been inactivated, and to specific methods and nucleic acid sequences used in gene editing to inactivate the CD163 gene. Swine wherein both alleles of the CD163 gene are inactivated are resistant to porcine reproductive and respiratory syndrome virus (PRRSv). Elite lines comprising homozygous CD163-edited genes retain their superior properties.

Pig with a genetically modified CD163 gene resistant to PRRSv

Methods for improving the health of porcine species by targeted inactivation of CD163

The present disclosure relates methods and compositions useful for prevention of porcine reproductive and respiratory syndrome virus (PRRSv) in animals, including animals of the species. The present teachings relate to swine wherein at least one allele of a CD163 gene has been inactivated, and to specific methods and nucleic acid sequences used in gene editing to inactivate the CD163 gene. Swine wherein both alleles of the CD163 gene are inactivated are resistant to porcine reproductive and respiratory syndrome virus (PRRSv). Elite lines comprising homozygous CD163 edited genes retain their superior properties.

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Hendersonville, TN, United States of America

William Thomas Christianson