Korean Journal of Veterinary Service (한국동물위생학회지)

The Korean Society of Veterinary Service (한국동물위생학회)
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Genotypic diversity and prevalence of Porcine circoviruses for slaughter pigs in Korea

도축장 출하돈의 돼지써코바이러스 발생율과 유전형 분석

  • Bo-Mi Moon (Jeollabuk-do Institute of Livestock & Veterinary Research) ;
  • Keum-Sook Chu (Jeollabuk-do Institute of Livestock & Veterinary Research) ;
  • Seung-Chai Kim (College of Veterinary Medicine, Jeonbuk National University) ;
  • Hwan-Ju Kim (College of Veterinary Medicine, Jeonbuk National University) ;
  • Da-Jeong Kim (College of Veterinary Medicine, Jeonbuk National University) ;
  • Won-Il Kim (College of Veterinary Medicine, Jeonbuk National University)
  • Received : 2023.11.28
  • Accepted : 2023.12.03
  • Published : 2023.12.30
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Abstract

This study was carried out to investigate the genotypic diversity of PCV2 and co-infection of PCV3 in the hilar lymph nodes of 700 randomly-selected slaughter pigs. Fourteen samples per each farm were obtained from 50 farms between February and August in 2022. Of the 50 farms, 44 farms that had been positive for PCV2 by RT-PCR were genotyped. As a result of PCV2 genotyping, positive rate of PCV2 DNA was 62.3% (436/700). Among the PCV2 DNA-positive samples, positive rate of a single PCV2 genotype was 79.1% (345/436), while multiple PCV2 genotypes were only detected in 20.9% (91/436). Of the 436 single infection cases, PCV2d genotype was most prevalent. Positive rates of PCV2 and PCV3 were 53.6% and 26.0% at the sample level, 5.1% and 8.0% at the farm level, respectively. And the co-positive rate of two viruses was 8.7% (61/700) at the sample level, 62.0% (31/50) at the farm level. These results demonstrate that PCV2 prevalence in slaughter pigs is very high and co-infection between different PCV2 genotypes and between PCV2 and PCV3 is relatively common. Therefore, genetic diversity and co-infection between other porcine circoviruses should be consistently monitored in the future.

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References

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