China Animal Husbandry and Veterinary Medicine ›› 2020, Vol. 47 ›› Issue (4): 1183-1190.doi: 10.16431/j.cnki.1671-7236.2020.04.024

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Epidemiological Investigation Analysis of Porcine Circovirus Type 3 in Guangxi

DUAN Qunpeng1, ZHAO Shuo1,2, QIN Yibin1, LU Bingxia1, HE Ying1, CHEN Zhongwei1, LIU Lei1, ZHOU Yingning1, LI Bin1, JIANG Dongfu1, LIANG Jiaxing1, ZHAO Wu1   

  1. 1. Guangxi Key Laboratory of Veterinary Biotechnology, Guangxi Veterinary Research Institute, Nanning 530001, China;
    2. College of Animal Science and Technology, Guangxi University, Nanning 530005, China
  • Received:2019-10-17 Online:2020-04-20 Published:2020-04-17

Abstract: The purpose of this study was to investigate the infection situation and epidemic characteristics of porcine circovirus 3 (PCV3) in the pig population of Guangxi,so as to provide scientific basis for effective prevention and control.PCR method was used to detect PCV3 in 917 pig tissue samples with pathological changes from 482 large-scale pig farms in Guangxi from September 2017 to March 2019,and the difference of positive detection rate of PCV3 in different regions,years,seasons and age groups of pigs were considered.145 PCV3 positive samples were simultaneously tested for CSFV,PRRSV,PCV2,PRV and PEDV.The results showed that except for Baise and Fangchenggang,which were not detected,PCV3 had different degrees of infection in other 12 cities in Guangxi.From 2017 to 2019,the positive rate of PCV3 infection and the positive rate of PCV3 infected pig farms in Guangxi showed a trend of gradual increase.The infection rate of PCV3 was the lowest in summer,which was significantly lower than that in spring,autumn and winter.The infection rate of PCV3 was the highest in finishing pigs (21.70%),followed by aborted sows,protected pigs and aborted fetuses (20.00%,19.05% and 11.02%,respectively),and the lowest in suckling pigs (8.21%).PCV3 had the highest single infection rate (30.34%).Mixed infection of PCV3 with other pathogens was also relatively common,even with quadruple infection.The investigation results showed that PCV3 infection was more common in Guangxi,and increased in recent years,and might be seasonal,it had a certain degree of harm to pig groups in all growth stages,especially in finishing pigs,and it also had a great harm to sows and conservation pigs.The single positive rate of PCV3 was higher,but it was mainly mixed infection,especially with PRRSV and PCV2,which suggested that there might be synergism among the three pathogens in the process of infection.

Key words: porcine circovirus 3 (PCV3); epidemiology; detection analysis

CLC Number: