Porcine respiratory and reproductive syndrome is a disease that has circulated in the swine world for years – however a recent highly pathogenic strain of this virus is challenging pig herds. Dr. Doug MacDougald, a swine veterinarian working out of Southwest Ontario Veterinary Services has worked with producers in North America who have experienced outbreaks of this highly pathogenic PRRS strain – 144 Lineage 1C – and shares some case studies and practical tips for disease prevention.