SI与APP、PRRS、PCV－2和Mhyo交叉感染的血清学调查

对甘肃省健康规模猪场和发病（非流感）规模猪场进行H1N1和H3N2猪流感（SI）感染抗体检测，健康规模猪场H1N1SI和H3N2SI混合感染抗体阳性率为25．45％（28／110）；发病（非流感）规模猪场H1N1SI和H3N2SI混合感染抗体阳性率为25．97％（20／77）。对两个规模猪场1、6、7和10月份的抗体检测结果，平均抗体阳性率分别为21．27％、56．14％、75％和15．62％。H1N1和／或H3N2SI阳性猪场猪传染性胸膜肺炎（APP）、猪繁殖与呼吸综合征（PARS）、猪圆环病毒病（PCV-2）和猪支原体肺炎（Mhyo）感染抗体平均阳性率依次分别为50．79％、40．32％、43．82％和33．33％；猪传染性胸膜肺炎（APP）免疫抗体平均保护率为49．5％，猪繁殖与呼吸综合征（PRRS）、猪圆环病毒病（PCV-2）和猪支原体肺炎（Mhyo）免疫抗体阳性率依次分别为56．52％、47．92％和38．04％。

Serosurvey for cross infection of SI,APP, PCV-2 and MPS on swine farms in Gansu Provice

The infective antibodies for H1N1 SI and H3N2 SI was detected on both physical fitness and pathogenetic swine farms in Gansu province.The results showed that 25.45%（28/110）of pegs in physical fitness swine farms had mixed infection with both H1N1 SI and H3N2 SI and 25.97%（20/77）in pathogenetic swine farms.The average positive ratios of antibody for H3N2 SI in pigs from 2 farms in January ,June,July and October in 2009 were individually 21.27%,56.14%,75% and 15.62%.The average positive ratio of infective antibodies for porcine Actinobacillus pleuropneumonia infection（APP）,porcine reproductive and respiratory syndrome（PRRS）,porcine circovirus -2 infection （PCV-2）and Myncoplasmal pneumonis of swine（MPS）were individually 50.79%,10.32%43.82%and 33.33% in swine farms infected with H1N1 SI and/or H3N2 SI.The average protective ratio of immune antibodies for APP ,PRRS ,PCT-2 and MPS were individually 49.5%,56.2%,47.92% and 38.04%.