Korean Journal of Veterinary Service (한국동물위생학회지)

The Korean Society of Veterinary Service (한국동물위생학회)
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Comparison of PRRSV and antibody detection in oral fluid and serum samples from different age categories of PRRSV endemic farms

PRRS 양성농장의 사육단계별 구강액과 혈액을 이용한 PRRSV와 항체 검출 비교

  • Received : 2020.09.03
  • Accepted : 2020.09.14
  • Published : 2020.09.30
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Abstract

The objective of this study was to evaluate the usefulness of detection of PRRSV and PRRSV-specific antibodies in oral fluids for monitoring of PRRSV infection in endemic farms. The level of PRRSV and anti-PRRSV antibodies in serum and oral fluids was evaluated in five age groups of pigs (6, 9, 12, 16 weeks of age and gilts). The samples (25 serums and 5 oral fluids/per a farm) were collected from 5 different farms endemically infected by PRRSV. Both serum and oral fluid samples were tested for PRRSV by quantitative reverse-transcription polymerase chain reaction (qRT-PCR) and for anti-PRRSV antibodies by two commercial PRRSV ELISA kits. ELISA mean s/p ratios (2.98 vs 1.63) and positive rate (84.0% vs 68.8%) of the oral fluid samples showed significantly higher levels but had similar patterns to the seroprofile of the blood samples. The PRRSV positive rate of oral fluid and serum samples was 40.0% and 44.0% respectively. In conclusion, the use of oral fluids for PRRS monitoring in endemic farms is strongly recommended.

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References

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