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Age distribution of porcine sapovirus asymptomatic infection and molecular evidence of genogroups GIII and GIX? circulation in distinct Brazilian pig production systems

机译:猪Sapovirus无症状感染的年龄分布和基因组GIII和GIX的分子证据?巴西独特的生猪生产系统中的血液循环

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摘要

This study aimed to evaluate the natural infection by SaVin pigs of different categories of production cycle in an important Brazilian pig-producing region. Faecal samples (n= 169) of suckling, post-weaning, finisher and breeder pig categories were analysed. Animals were from five farrow-to weaning and nine grower-to-finish commercial pig farms. The RT-PCR assay was performed targeting the partial RNA-dependent RNA polymerase (RdRp) gene of porcine SaV genome. The virus was detected in 23.7 % (40/169) of faecal samples and in 10/14 (5/5 farrow-to-weaning; 5/9 grower-to-finish) of pig farms evaluated. Porcine SaV was most frequently (p0.05) detected in pigs at post-weaning than in grower-to-finish and breeder categories. The phylogenetic analysis revealed that the porcine SaV strains belong to the GIII and GIX? genogroups. This study showed that the porcine SaV GIII genogroup has spread in the pig herds and provides the first evidence of GIX? genogroup circulation in South America.
机译:这项研究旨在评估在重要的巴西猪产区不同生产周期的SaVin猪的自然感染情况。分析了乳类,断奶后,育肥猪和种猪的粪便样本(n = 169)。动物来自五个分娩场到断奶场和九个种植者到肥育场的商业养猪场。靶向猪SaV基因组的部分RNA依赖性RNA聚合酶(RdRp)基因进行了RT-PCR分析。在评估的猪场中,有23.7%(40/169)的粪便样本和10/14(5/5到断奶; 5/9种植者到肥育)之间检测到了病毒。断奶后猪中猪SaV的检出率最高(p <0.05),而从成年到育成和育种者的检出率最高。系统发育分析表明,猪SaV病毒株属于GIII和GIX?基因组。这项研究表明,猪SaV GIII基因组已经在猪群中传播,并提供了GIX的第一个证据。南美的基因组循环。

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