Haemophilus parasuis is a Gram-negative and an opportunistic pathogen of swine.It is responsible for cases of fibrinous polyserositis,arthritis,dyspnea and intense heat in young pigs.

• 副猪嗜血杆菌为革兰氏阴性的条件性致病菌,常引起断奶前后仔猪以多发性浆膜炎、关节炎、呼吸困难、高热等临床特征的传染性疾病,给养猪业带来重大经济损失。