Senecavirus A - SVA (Seneca Valley Virus)

microscopis Senecavirus A - Seneca Valley Virus

Senecavirus A - SVA (Seneca Valley Virus) belongs to Genus Senecavirus within the Picornaviridae family. The clinical signs are characterized by vesicles/blister and coalescing erosions on the snouts and coronary bands in clinically infected sows, nursery, and finishing pigs (Figure 1). Increased mortality in neonatal pigs has also been sporadically reported.  The picture to the right is a microvesicle in the epidermis (skin) of a pig infected with SVA. SVA mRNA is stained by the red dots.  (Provided by Dr. F. Vannucci at the MNVDL).  It is imperative to differentiate SVA from other viruses that cause skin vesicles/blisters such as the Foot and Mouth Disease virus. If you see vesicles/blisters on your pigs, call your veterinarian immediately.

The MNVDL routinely tests for SVA by PCR and Serology.