Investigation on Pathogens of Major Viral Diarrhea in Pig Farms in East China from 2017 to 2019 |
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| Authors: | CHANG Xinjian ZHOU Jinzhu YIN Jie NIU Beibei FAN Baochao GUO Rongli ZHAO Yongxiang NIU Jiaqiang HE Kongwang LI Bin |
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| Institution: | 1. Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;2. College of Animal Science, Tibet Agriculture and Animal Husbandry College, Linzhi 860000, China;3. College of Animal Science and Technology, Inner Mongolia University for Nationalities, Tongliao 028000, China;4. College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210014, China |
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| Abstract: | To investigate the epidemic situation of viral diarrhea in East China in recent years, and provide epidemiological survey data for comprehensive prevention, 549 fecal samples were collected in 2017-2019 from diarrhea pigs in 5 cities of East China and RT-PCR were used to detect porcine epidemic diarrhea virus (PEDV), porcine rotavirus (PoRV), porcine transmissible gastroenteritis virus (TGEV), porcine deltacoronavirus (PDCoV) and porcine Sapelovirus (PSV), and statistical analysis of its positive rate and mixed infection was performed.The results showed that during 2017 and 2019, PEDV,PDCoV,PoRV,TGEV and PSV positive rate were 62.6% (372/594),27.9% (166/594),16.8% (100/594),13.3% (79/594), and 3.87% (23/594), respectively.In the double mixed infection, the average mixed infection rate of PEDV + PDCoV and PEDV + PoRV were the main ones, which were 22.4% (133/594) and 13.3% (79/594), respectively. Among the triple infections, the mixed infection rate of PEDV + PoRV + PDCoV was dominated by 7.58% (45/594), and there were no mixed infections of four and five pathogens. The highest positive detection rate of PEDV was during 2017 and 2019, and mixed infection with PoRV and PDCoV, which was currently the focus of prevention and control of viral diarrhea in East China. TGEV and PDCoV accounted for a large proportion of the detection rate of healthy fattening pigs and sows, indicating that recessive infections had become common and deserve attention from farmers. In addition, the detection rate of PSV was more lower than the other four diarrhea viruses. On the whole, since August 2018 that the farms strengthened biosecurity prevention and control measures, the detection rate of various pathogens and the detection rate of sites have shown a downward trend year by year. |
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| Keywords: | porcine viral diarrhea PEDV mixed infection East China |
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