Seneca Valley virus VI positive flies (Musca domestica): What questions does this pose for the swine industry?

摘要

Vesicular disease cases associated with Seneca Valley virus (SW) (Senecavirus A) have recently increased in the swine industry.' Vesicular disease is a broad term used to cover several diseases associated with similar clinical signs, such as open or closed blisters located on the snout and/or at the junction where the skin and the hoof wall meet (Coronary band), sudden lameness with redness and swelling at or around the coronary band, and pigs that are suddenly off feed, lethargic and/or have a feverup to 105 degrees Fahrenheit.2 Foot and mouth disease (FMD) is the major disease of concern. FMD is on the foreign animal disease list and can have a major impact due to being very contagious and having the potential to close foreign trade. Diseases associated with vesicular disease are guilty of being FMD until proven otherwise through diagnostic testing. Idiopathic vesicular disease caused by the Seneca Valley virus is one such disease. Seneca Valley virus belongs to the same virus family as FMD, {picornaviridae) and will have similar clinical symptoms to FMD. Major disruptions in pig flow for producers and packers are the result of pigs shipped exhibiting signs of vesicular disease, until a non-FMD diagnosis is confirmed. A recent general veterinarian opinion and observation was that SW has been seen more often in warmer summer months, versus other viral pathogens. What is the significance of this general observation? Is there something about warmer months associated with an increase in SVV infections? In this discussion, flies were mentioned and a question was posed: can flies carry SVV? Seeking this answer became the basis for this preliminary study testing whether flies can harbor live viable Seneca Valley virus.