The National Sheep Association (NSA) has renewed its call for urgent action in response to the spread of bluetongue virus serotype three (BTV-3), a midge-borne disease that affects livestock. "The number of reported cases shot up last week to over 590, from just 115 the previous week. He said: "A level of protection is likely to be reached earlier, particularly if stock were vaccinated last season. "The Sheep Veterinary Society has noted that the virus can be transmitted via used needles, so please do take care when vaccinating your stock." The NSA is also encouraging farmers to keep detailed records of cases, including severity, mortality, and recovery rates.