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Influenza roundtable: Taking control programs to the next level in sows and pigs

Despite the pork industry’s best efforts, influenza A virus in swine (IAV-S) continues to evolve and remains a challenge for US pork producers and veterinarians — particularly in grow-finish systems. The year-round presence of the virus has compounded the problem and made control programs more challenging.

In addition, broad-based movement of pigs throughout the country means that multiple flows often come together from different areas. This complicates the ability to identify specific strains, let alone control them, said veterinarians during a roundtable discussion on swine influenza hosted by Zoetis. Even within single-flow operations, multiple introductions of flu are common.

Veterinarians in the roundtable discussion agreed that managing IAV-S had become a major obstacle to raising healthy, profitable pigs.

“Outside of porcine reproductive and respiratory syndrome (PRRS), the thing that gets in our way the most is influenza,” said Clayton Johnson, DVM, veterinarian and director of health at Carthage Veterinary Services, Ltd, Carthage, Illinois.

Monitoring the virus is therefore critical to the success of control programs. “If you could figure out what virus was going to trigger it, you could go in quickly and vaccinate your way out of it,” Johnson added….



Read the rest of this article and download our Integrated flu management: New strategies for control special report.



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Despite the pork industry’s best efforts, IAV-S remains a challenge for US pork producers year-round, particularly in grow-finish systems. Nine veterinarians discussed the challenges of the costly virus and the prospects for new control strategies.

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Posted on March 10, 2021

  • 8 ways to boost immunity in livestock

    Victor Cortese, DVM, PhD, drew on his decades of field experience and expertise in immunology to offer tips for optimizing immunity in swine herds in the face of IAV-S.

  • New approaches to influenza control look promising

    Influenza-A virus of swine (IAV-S) is a thorn in the side of US pork producers, and it’s a difficult thorn to remove. If the virus were more pathogenic, veterinarians and producers would probably talk about it more.

  • Highlights of flu-management strategies meeting now available

    A special report from Pig Health Today, “Integrated Flu Management: New Strategies for Control,” reports on key presentations by experts in influenza A virus in swine (IAV-S) and features highlights of a roundtable involving swine practitioners.

  • Preventing flu transmission from humans to pigs

    Farm employees can have a marked impact on the success of controlling IAV-S. Two roundtable panelists share their views.

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Challenges associated with controlling porcine reproductive and respiratory syndrome virus (PRRSV) have resulted in the increased use of molecular diagnostic tests and sequencing, according to Phillip Gauger, DVM, PhD, Iowa State University.

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