四川省PPV与PCV2的病原流行病学调查

从四川省21个规模化猪场采集样品273份，利用PCR方法检测并分析了猪细小病毒和猪圆环病毒的感染及混合感染情况，结果共检出PPV病原阳性样品47份（占17．22％）；PPV阳性猪场8个（占38．1％）；种猪的感染率较高，仔猪感染率相对较低；检出PCV2病原阳性样品143份（占52．38％），PCV2阳性猪场18个（占85．7％）；PCV2感染随猪年龄的增长而升高；检出PPV和PCV2混合感染样品29份（占10．62％）；同时存在PPV和PCV2的猪场6个（占28．7％），混合感染主要集中在母猪和保育仔猪阶段。仅有3个猪场未检出PPV和PCV2病原，占14．3％。该结果说明PPV与PCV2及其混合感染在四川省流行广泛，对养殖业构成了较严重的危害。

Antigen Epidemiology Survey of Porcine Parvovirus and Porcine Circovirus Type 2 in Sichuan Province

Two hundred and seventy-three samples were collected from 21 large pig farms in Sichuan province, and antigen epidemiology of porcine parvovirus and porcine circovirus type 2 were investigated by PCR detecting. The antigen positive rate of porcine parvovirus was 17.22% (47/273), and positive rate of pig farms was 38.1% (8/21), which displaied a feature that infection rate of boar was much higher than that of piglets; The antigen positive rate of porcine circovirus type 2 was 52.38% (143/273), and positive rate of pig farms was 85.7% (18/21), which showed a trend that the infection rate of porcine circovirus type 2 was rising with the piglets growth. The co-infection rate of porcine parvovirus and porcine circovirus type 2 was 10.62% (29/273), and co-infection rate of pig farms was 28.7% (6/21). Co-infection was mainly take place in the sow and nursing piglets. Only 14.3% pig farms were antigen epidemiologically negative of porcine parvovirus and porcine circovirus type 2(3/21). Above results revealed that porcine parvovirus, porcine circovirus type 2 and co-infection were popular in Sichuan province, which threaten the healthy development of pig industry.