#13-242
CompleteCategory
Swine Health-PRRSDate Full Report Received
06/23/2014Date Abstract Report Received
06/23/2014Investigation
Institution: University of MinnesotaPrimary Investigator: Robert B. Morrison
Co-Investigators: Enrique Mondaca DVM, Jeffrey Zimmerman, Peter Davies, Derald Holtkamp, Christa Goodell, Z Poljak, S Tousignant, P Valdes-Donoso
Funded By
National Pork BoardCost of PRRS virus was estimated for the United States to be approximately $560 million in 2005 and $664 million in 2011 [12, 13]. PRRS incidence has been difficult to estimate because differentiating new PRRSV introductions from resident or vaccine strains is technically challenging and expensive [14-16]. A coordinated action item from an American Association of Swine Veterinarians PRRS task force, referred to as National PRRS Incidence project, was initiated in 2011. In this project, voluntary participants agreed to share PRRS status of their sow herds using standardized terminology for status and new infection [17, 18]. Also agreeing to share retrospective data to 2009, this project now has four years of incidence data being reported across 14 production companies, 374 sow farms, and 1.2 million sows [19]. This project has revealed striking repeatability of the annual PRRS epidemics in the participating herds. For each assessed year (2011-2013), the incidence has exceeded the annual average in mid-October, signaling the onset of an epidemic of PRRS virus. The highest and lowest incidence rates occur in late winter and mid-summer, respectively.