Seneca Valley Virus (SVV) was recently diagnosed in pigs in the United States. The virus has also been found in South America, Australia, New Zealand, and Europe. The virus is a non-enveloped single-stranded RNA virus of the family Picronaviradae. Foot and Mouth Disease Virus (FMDV) and swine vesicular disease virus are also a member of this same viral family. Experts have not been able to determine how SVV is spread between farms, but transportation vehicles is suspected.

Seneca Valley Virus

Clinical signs of SVV

  • Vesicles and coalescing erosions on the snouts and coronary bands
  • Acute lameness in a group of pigs
  • Ulcerative lesions on or around the hoof wall
  • Anorexia, lethargy and/or febrile; in the early course of the disease, fevers up to 105 degrees F have been reported

Since the vesicles are indistinguishable from FMDV, vesicular stomatitis, swine vesicular disease, and vesicular exanthema of swine a foreign animal disease investigation must be done quickly.  Please contact your private veterinary if a blister appears on the nose, mouth, or feet. 

Hog producers identifying any signs of vesicular disease must immediately report to the State Veterinarian's office at (701)328-2655 or 800-242-7535.  Any movement from the farm is temporarily halted until directed by state and federal authorities.  Hogs with lesions or any other listed clinical signs should not be taken to slaughter. 



Seneca Valley Virus (SVV) Contacts

North Dakota State Board of Animal Health

600 East Boulevard Ave. Dept. 602 Bismarck, ND 58505-0020