2014-2018年广西6种猪主要病毒性繁殖障碍疫病流行病学调查

doi:10.16431/j.cnki.1671-7236.2019.02.024

Abstract

Abstract:

The aim of the study was to understand the occurrence of major viral reproductive disorders of pigs in Guangxi and provide a scientific basis for the prevention and control of such diseases.6 major viral reproductive disease pathogens of swine fever virus (CSFV),porcine reproductive respiratory syndrome virus (PRRSV),porcine circovirus type 2 (PCV2),pseudorabies virus (PRV),porcine parvovirus (PPV) and porcine Japanese encephalitis virus (JEV) from 349 aborted fetus samples from March 2014 to February 2018 in Guangxi were collected by RT-PCR/PCR,and the positive detection rate in different years and seasons and the mixed infection of pathogens were analyzed.The results showed that from 2014 to 2017,the positive rate of pig farms of six pathogens from high to low were JEV (36.00%),PRRSV (16.00%),PCV2 (9.00%),PRV (7.00%),PPV (6.00%) and CFSV (5.00%);The positive detection rate of samples from high to low were JEV (27.06%),PRRSV (6.18%),PRV (5.88%),PCV2 (3.82%),CSFV (2.35%) and PPV (2.35%).Seasonal factors had an impact on the occurrence of six viral reproductive disorders:The detection rate of JEV was higher in summer and autumn,and was lower in spring and winter;The detection rate of PRRSV was higher in all seasons,and there was no significant difference;PCV2 had higher detection rate in spring,followed by summer and winter, and the detection rate was lower in autumn;The detection rate of PRV was higher in spring and winter,and the detection rate was 0 in summer and autumn;The detection rate of PPV was higher in summer,followed by spring and autumn,and the detection rate was 0 in winter;CSFV had highest detection rate in winter,followed by summer,and the detection rate was 0 in spring and autumn.The abortion fetus was dominated by a single infection.The six viruses had different degrees of single infection.The single infection rate was the highest in JEV (23.82%) and the lowest in PCV2 (0.59%).The mixed infection was mainly caused by double infection.Among them,the double infection was more in 2016,and the infection combination was diverse.The triple infection was less,only in 2016.One case was found in the samples submitted,and no quadruple or more infections were found.The results showed that from 2014 to 2017,JEV had a high positive detection rate,which had become the most important viral pathogen in sow abortion in some pig farms in Guangxi.PRRSV and PRV still were the main viral pathogens causing abortion in sows in Guangxi.

Key words: aborted fetuses; viral reproductive disorders; epidemiology

CLC Number:

S852.65

DUAN Qunpeng, CHEN Zhongwei, HE Ying, ZHOU Yingning, LI Xiaoyu, LIANG Jiaxing, BI Bingfen, YANG Siyi, JIANG Dongfu, LU Jingzhuan, LI Bin, QIN Yibin, LU Bingxia, SU Qianlian, ZHAO Wu. Epidemiological Survey of Six Major Viral Reproductive Disorders of Pigs in Guangxi During 2014 to 2018[J]. , 2019, 46(2): 526-535.

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Epidemiological Survey of Six Major Viral Reproductive Disorders of Pigs in Guangxi During 2014 to 2018

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