Czyżewska-Dors Ewelina, Dors Arkadiusz, Kwit Krzysztof, Pejsak Zygmunt, Pomorska-Mól Małgorzata
Department of Swine Diseases, National Veterinary Research Institute, 24-100 Pulawy, Poland.
J Vet Res. 2017 Dec 6;61(2):157-161. doi: 10.1515/jvetres-2017-0020. eCollection 2017 Jun.
The aim of this study was to assess the seroprevalence of swine influenza A virus (SIV) in Polish farrow-to-finish pig herds.
Serum samples collected from 5,952 pigs, from 145 farrow-to-finish herds were tested for the presence of antibodies against H1N1, H1N1pdm09, H1N2, and H3N2 SIV subtypes using haemagglutination inhibition (HI) test. Samples with HI titres equal or higher than 20 were considered positive.
HI antibodies to at least one of the analysed SIV subtypes were detected in 129 (89%) herds and in 2,263 (38%) serum samples. Antibodies to multiple SIV subtypes were detected in 104 (71.7%) herds and in 996 (16.7%) serum samples. Concerning the seroprevalence rate, according to age category, the highest prevalence of the antibodies was detected in weaners, with regard to the H1N1, H1N2, and H3N2, and in sows, with regard to the H1N1pdm09. The lowest seroprevalence for all evaluated SIV subtypes was detected in finishers.
The study indicates that antibodies against single and multiple SIV subtypes are circulating in Polish farrow-to-finish herds and highlights the importance of conducting a molecular surveillance programme in future studies.
本研究旨在评估波兰从仔猪到育肥猪群中甲型流感病毒（SIV）的血清流行率。
从145个从仔猪到育肥猪的猪群中采集的5952份猪血清样本，使用血凝抑制（HI）试验检测针对H1N1、H1N1pdm09、H1N2和H3N2 SIV亚型的抗体。HI效价等于或高于20的样本被视为阳性。
在129个（89%）猪群和2263份（38%）血清样本中检测到针对至少一种分析的SIV亚型的HI抗体。在104个（71.7%）猪群和996份（16.7%）血清样本中检测到针对多种SIV亚型的抗体。关于血清流行率，按年龄类别划分，在断奶仔猪中检测到H1N1、H1N2和H3N2抗体的流行率最高，在母猪中检测到H1N1pdm09抗体的流行率最高。在育肥猪中检测到所有评估的SIV亚型的血清流行率最低。
该研究表明，针对单一和多种SIV亚型的抗体在波兰从仔猪到育肥猪的猪群中传播，并强调了在未来研究中开展分子监测计划的重要性。
