SVV Oral Fluids Testing Sheds Light on Distribution

The Swine Health Information Center (SHIC) recently funded the veterinary diagnostic labs at ISU and UMN to test oral fluid samples for Senecavirus A (SVV). AASV, NPB and NPPC joined SHIC and the diagnostic labs in supporting the need for testing to provide some insight into the distribution of the Seneca Valley Virus. Following is a summary of the project and the results.

Objective: Expeditiously obtain some insight to better understanding the prevalence of Senecavirus A (Seneca Valley Virus) currently circulating in US swine herds that are not known to be exhibiting clinical signs of acute lameness accompanied by the presence of vesicular lesions on the snout, coronary band, and/or hoof.

Materials & Methods: Senecavirus A PCR testing was completed on a total of 441 Cases (2,033 Oral Fluid Samples) from 25 different states and a few isolated submissions from Canada and Mexico received at the ISU VDL and UMN VDL for routine diagnostic testing between 8/24/15 to 9/01/2015 that were not otherwise known to be exhibiting clinical signs of acute lameness accompanied by the presence of vesicular lesions on the snout, coronary band, and/or hoof.

Results: 5 cases submissions from 5 different states contained oral fluid samples testing Senecavirus A PCR positive. (i.e., 1.1 % of these Cases and 1.2% of these Samples tested Senecavirus A PCR positive) Additionally - subsequent practitioner feedback revealed that 1 of the 5 cases testing Senecavirus A PCR positive in this retrospective testing was later found to have clinicial signs of vesicular disease (lesions) present.

The complete results and additional summary information are posted on the AASV Seneca valley virus web page and can be accessed here.