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Iowa State Veterinary Researcher Will Update Study On Economic Impact Of Costly Disease In Pigs

By Derald Holtkamp
 
An Iowa State University veterinarian is crunching updated numbers to determine the current economic impact of porcine reproductive and respiratory syndrome, thought to be the costliest disease to threaten the pork industry.
 
Derald Holtkamp, an associate professor of veterinary diagnostic and production animal medicine, is undertaking a three-year study to determine if recent management practices implemented by pork producers to combat the virus are curbing the monetary losses the industry has sustained for decades.  
 
The effort, funded by a grant from the National Pork Board, will update a previous study Holtkamp released in 2012 that pegged the pork industry’s annual losses due to the virus at $664 million.
 
The virus that causes porcine reproductive and respiratory syndrome (PRRS) has shown a knack for evading immune responses in pigs since it was first identified in the United States in the mid-1980s, Holtkamp said. The virus can infect pigs of any age.
 
“It’s a clever virus,” Holtkamp said. “It changes rapidly to keep a pig’s immune system from fighting it off. We have vaccines, but their efficacy is often limited.”
 
The virus has posed a recurring challenge for the pork industry with 20 to 40 percent of breeding herds experiencing outbreaks in a given year, he said.
 
The National Pork Board set a goal to slash the annual economic impact of PRRS by 20 percent by the year 2020. Since Holtkamp finished his previous study, pork producers have implemented a number of management practices to control the disease, and the updated study will offer insight into how effective those efforts have been toward achieving the National Pork Board’s goal, he said.
 
Producers have tried a combination of strategies to fight the virus, including vaccines and strategic sanitation of facilities to stop the virus’s spread among the most susceptible pigs. Holtkamp likens those strategies to “taking away all the dry wood so the fire runs out of fuel.”
 
Holtkamp said the updated study will draw on a combination of data supplied by pork producers and surveys and diagnostic data from local veterinarians. Holtkamp’s team will release an update on the economic effects of the virus quarterly for three years.
 
“This is a way to measure the progress we’ve been making against the pathogen and the disease it causes,” Holtkamp said. “We’ll be able to see if we’re moving the ball on PRRS. I think we are and will continue to do so.” 
 
 

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