四川省PPV与PCV2的病原流行病学调查

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

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。

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.