雲林縣某種豬場，於101年5月底發現肥育豬出現食慾不振、呼吸困難及發燒等臨床症狀，部分豬隻於發病後1-2天死亡，耐過豬隻可於皮膚觀察到微隆凸於表皮之菱形紅斑。

An outbreak occurred in a swine breeder farm in Yunlin County in May, 2012. The pigs developed clinical signs including anorexia, dyspnea, and high fever.