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‘False alarms’ by Seneca Valley virus trigger costly FMD investigations

A growing number of Seneca Valley virus (SVV) outbreaks wastes the time and money of people who investigate suspected foreign animal-disease outbreaks, reported Fabio Vannucci, DVM, assistant professor at the University of Minnesota.

SVV clinically mimics foot-and-mouth disease (FMD). As a result, an outbreak of SVV must be treated like a foreign animal disease until the government can rule out FMD.

“The FMD diagnostics take up the time of laboratories, veterinarians and state officials. Because it looks like FMD, it is very scary for the industry and public. It is a huge inconvenience and burden,” Vannucci told Pig Health Today.

Better understanding, testing needed

“We don’t really understand much about SVV,” Vannucci admitted. “We do know in countries with FMD, an outbreak is widespread throughout a production system. This is opposite to SVV, which happens in batches or pockets. Not all the pigs are affected at once so its transmission to other pigs occurs in progressive weeks.

“It doesn’t have a direct impact on hogs in terms of production or mortality, except transient neonatal mortality,” he added.

SVV is very stable and will survive in most environments. Trailers used to haul pigs may be a potential problem because most cleaning solutions won’t kill the virus. He did note hydrogen peroxide is pretty effective.

Testing for SVV has improved with same-day polymerase chain reaction testing of oral swabs.


Posted on May 25, 2018

tags: , ,
  • Quarantine window for feed ingredients may reduce hog disease risk

    Foreign animal diseases (FAD) are top of mind as the ongoing outbreaks of African swine fever (ASF) in China, Belgium and elsewhere, have raised the stakes to implement new practices designed to minimize disease transmission.

  • Lessons learned from recent Seneca Valley outbreaks

    The Seneca Valley virus (SVV) is proving to be something of a test case for swine producers’ and veterinarians’ preparedness for foreign animal diseases.

  • Ag groups demand FMD vaccine bank to protect farming sector

    A coalition of more than 100 farm organizations and businesses have called on the US government to create a vaccine bank in case of future outbreaks of foot-and-mouth disease.

  • Change to FMD vaccine policy vital to protect US pig sector

    The US foot-and-mouth disease (FMD) vaccination policy needs a multi-million dollar overhaul to protect the country’s pig sector from the threat of the disease, farm leaders say.

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It’s not unrealistic to say that if you checked the nasal cavities or tonsils of any group of pigs, you would find Strep suis. While the strain and impact can vary widely, this commensal bacterium is on virtually every hog farm.

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