Seneca Valley virus (SW or SVA) is not a new virus to the US. During the summer and early fall of 2015 SVV was causing severe clinical signs in naive herds across the Midwest. These early outbreaks of SVV caused concern for practitioners and producers, who were inexperienced with disease shedding and eradication procedures.On August 29, 2015 an operator of a 1000 sow breed to wean farm notified me that gilts had become severely lame. A Minnesota Board of Animal Health visit was set up immediately. On that visit 80% of sows were found to have snout lesions. Many of these animals were slow to rise. Foot lesions were identified primarily on the bottom of pad and were most noticeable when sows laid down and the bottoms of their feet were exposed. Piglet mortality increased by 10% for 2-weeks and quickly came back down to normal (Figure 1). There were no scours noted as reported in other SW breaks around the same time. Stillborns increased by 14% for one week. Stillborn rate fell back to herd average as gestating sows tecovered. (Figure 2).
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