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

摘要

[Objective] The study aimed to analyze the prevalence of Porcine Parvovirus (PPV) and Porcine Circovirus Type 2 (PCV2) and the mixed infection in Sichuan Province to lay the foundation for further predicting the tendency of the plague and formulating appropriate prevention and control strategies. [Method] Two hundred and seventy-three samples were collected from 21 large pig farms in Sichuan province, and epidemiology of PPV and PCV2 were investigated by PCR detecting. [Result] The positive rate of PPV was 17.22% (47/273), and positive rate of pig farms was 38.1% (8/21), meanwhile it also displayed the feature that infection rate of boar was higher than that of piglets; The positive rate of PCV2 was 52.38% (143/273), and positive rate of pig farms was 85.7% (18/21), and it showed the trend that the infection rate of PCV2 was rising with the growth of the age. The co-infection rate of PPV and PCV2 was 10.62% (29/273), and co-infection rate of pig farms was 28.7% (6/21), which mainly concentrated in the sow and nursery piglets. Only 14.3% (3/21) pig farms was epidemiologically negative of PPV and PCV2. [Conclusion] PPV and PCV2 and co-infection was widely popular in Sichuan province, and it did more serious harm to the pig-raising industry.