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Bulletin No. 16 - Fall 2003
Fourth International Symposium on Emerging and Re-emerging Pig diseasesPorcine Reproductive and Respiratory Syndrome (PRRS)
MARTELLI P, CORDIOLI P, FALLACARA F, TERRENI M, CAVIRANI S
Genetic diversity (ORF5) of PRRSV isolates from a herds with SAMS
Proceedings of the 4th International Symposium on Emerging and Re-emerging Pig Diseases, 2003, 56-57
During an outbreak of sow abortion and mortality syndrome (SAMS), virus isolation and DNA sequencing of ORF5 in sows, weaners and replacement gilts were carried out. All isolates of PRRSV were shown to belong to the European type but although isolated within the same herd, they demonstrated great genomic diversity. The concomitant presence of three different strains of PRRSV (likely introduced with replacement animals or semen) in a single herd illustrates the existence of multiple PRRSV infections and the need for appropriate control strategies.
