Seneca Valley Virus Disease Reports Increasing

Seneca Valley virus disease
The Seneca Valley virus disease is on a slow upswing in the United States, and a University of Missouri Extension veterinarian says pork producers need to be prepared if the disease strikes their operation. Veterinarian Corinne Bromfield (BROM-field) says the Swine Health Information Center reported that diagnostics labs had seen more than 60 cases of the virus from January to June 2016. They reported only 20 cases in the previous 30 years. The virus is in the same family as foot-and-mouth disease and causes vesicular lesions in pigs. Bromfield says producers who suspect the virus in their operation should contact their veterinarian and state agriculture department immediately, as visual diagnosis is not possible. Further, if suspected, producers should quarantine animals and halt movement of anyone who has been near the hogs.

From the National Association of Farm Broadcasting news service.

From: Swine Health Information Center

Seneca Valley Virus Summary

Etiology

Seneca Valley virus (SVV) is a small, non-enveloped picornavirus, unknown until 2002 when it was discovered incidentally as a cell culture contaminant.

Only a single species is classified in the genus Senecavirus. The family Picornaviridae also contains foot-and-mouth disease virus (FMDV) and swine vesicular disease virus (SVDV).

Cleaning and Disinfecting

The efficacy of most disinfectants against SVV is not clearly known.

Because vesicular diseases are clinically indistinguishable, disinfection protocols for FMDV should be followed even if SVV is suspected. This includes use of: sodium hydroxide, sodium carbonate, 0.2% citric acid, aldehydes, and oxidizing disinfectants including sodium hypochlorite.

Below are EPA-approved disinfectants USDA lists effective for FMD on page 30 http://www.aphis.usda.gov/animal_health/emergency_management/downloads/fad_epa_disinfect ants.pdf. Be sure to follow labeled directions.

Epidemiology

The survival of SVV in the environment has not been reported. Most cases of idiopathic vesicular disease, which is associated with SVV, seem to occur between spring and fall.

Neutralizing antibodies to SVV have been detected in small populations of swine, cattle, and wild mice in the United States. Specially, SVV has been reported in South Dakota, Iowa, Minnesota, North Carolina, New Jersey, Illinois, Louisiana, and California. The virus has also been reported in Australia, New Zealand, and Brazil.

There is no record of SVV causing symptomatic human disease. The virus has potent oncolytic abilities which are currently being explored in human cancer treatment research.

Read more about Transmission, Infection in Swine/Pathogenesis, Diagnosis, Immunity, Prevention and Control and more.

Seneca Valley Virus Fact Sheet (.pdf)