Detection of viral infectious agents from aborted fetuses in sows with a reproductive failure in Korea
2008
Lee, C.S. (Green Cross Veterinary Products, Yongin, Republic of Korea) | Song, D.S. (Green Cross Veterinary Products, Yongin, Republic of Korea) | Luo, Yuzi (Seoul National University, Seoul, Republic of Korea) | Kang, B.K. (Green Cross Veterinary Products, Yongin, Republic of Korea) | Yang, J.S. (Seoul National University, Seoul, Republic of Korea) | Moon, H.J. (Seoul National University, Seoul, Republic of Korea) | Kim, H.K. (Seoul National University, Seoul, Republic of Korea) | Park, S.J. (Seoul National University, Seoul, Republic of Korea) | Kim, E.M. (Seoul National University, Seoul, Republic of Korea) | Park, B.K. (Seoul National University, Seoul, Republic of Korea), E-mail: parkx026@snu.ac.kr
Porcine reproductive and respiratory syndrome virus (PRRSV), porcine circovirus type (PCV2), porcine parvovirus (PPV), swine influenza virus (SIV), encephalomyocarditis virus (EMCV) and pseudorabies virus (PRV) have been associated with reproductive failure. The objective of this study was to determine the prevalence of viruses such as PRRSV, PCV2, PPV, SIV, EMCV, as well as PRV, in tissues from aborted fetuses. 176 different cases of abortions were collected randomly in Korean swine farms during May of 2005 through September of 2006. In all 176 aborted cases, PRRSV was detected in 71/176 cases (40.3%) by RT-nested PCR. PCV2 in 29/176 cases (16.5%), PPV in 34/176 cases (19.3%) and EMCV in 5/176 cases (2.8%) was detected. PRV was not identified by PCR or SN test at all. By HI test, 51/96 cases (53.1%) were positive for swine H3N2 influenza virus, but only 3/96 cases (3.1%) were positive for swine H1N1 influenza virus in late-term abortion cases. The results suggest that PRRSV is the most dominant viral infectious agent associated to early and late abortion in pigs and PCV2 and PPV are important abortifacient pathogens. Also, H3N2 SIV is probably great contributor to late abortion fetuses. Abortion by non-infectious disease has great portion in reproductive failure. Other viral pathogens such as EMCV and PRV seem to have a minor impact on reproductive disease.
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