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Investigation on Infectious Agents of Aborted Pig Fetuses and Its Correlation with PRRSV mlv vaccine

Journal of Agricultural Science and Technology(A) 2017年第4期7卷 282-287页

作者： Woo-Taek Oh Van-Giap Nguyen Hyung-Joon Moon Jee-Hoon Lee Hye-Kwon Kim Seong-Jun Park Hee-Chun Chung Bong-Kyun Park Department of Veterinary Medicine Virology Lab College of Veterinary Medicine and Research Institute for Veterinary ScienceSeoul National University Daehak-ro 1 Gwanak-gu Seou108826 Korea Department of Veterinary Microbiology and Infectious Diseases Faculty of Veterinary Medicine Vietnam National University ofAgriculture Hanoi 50877 Vietnam Viral Infectious Disease Research Unit Green Cross Veterinary Products Yongin 17066 Republic of Korea Viral Infectious Disease Research Center Korea Research Institute of Bioscience and Biotechnology Daejeon 34141 Korea Forensic Medicine Division Daegu Institute National Forensic Service Chilgok 34054 Korea

Infectious agents causing aborted fetus problems in domestic pigs were investigated in this study. More than 10 different infectious agents were known to cause abortion in swine and the major eight viruses among them were inspected. One hundred twelve samples of aborted fetuses from nine provinces in South Korea were collected during April to November, 2013 in this study for the diagnosis of infectious agents causing abortions in pigs. Eight major infection viruses were examined in this study mainly using various diagnostic kits and reverse transcriptase polymerase chain reaction （RT-PCR）. Positive rate of the detection differed from each viruses. In this study, the main focus was the porcine reproductive and respiratory syndrome virus （PRRSV）, which took the second large portion in the positive rate of detection, and then its ORF5 gene was compared with modified live virus （mlv） vaccine.strain to figure out the influence of vaccine.on disease. Between four positive samples＇ sequence, two of them were 99.9%-100% similar to mlv vaccine.strain and two other samples were 88.6%-92.7% similar. Similarity rate of the sequences between the vaccine.and virus from aborted fetuses are very crucial, because it implies that abortion in swine can be made due to the usage of vaccine.not only by the infection of field virus, and if mlv vaccine.actually do have an impact on the infection, usage of the vaccine.should be reconsidered.

关键词： Abortion infectious agents domestic pig PRRSV mlv vaccine.

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