【摘要】 目的 了解猪戊型肝炎病毒(HEV)感染情况,探讨猪HEV基因型与人HEV的关系。方法用酶联免疫吸附法(ELISA)和逆转录巢式聚合酶链反应法(RT-nPCR)分别检测猪血清抗-HEV IgG抗体和猪HEV RNA,并用Vector NTI Suite 7和TreeView软件进行人与猪HEV核酸序列和基因进化树分析。结果 猪抗-HEV抗体阳性率为16.67%(18/108),并从18份抗-HEV IgG阳性的猪血清中扩增到2株(11.11%,分别命名为S18和S43)HEV 开放读码框(ORF)1片段(102～387bp),两者核苷酸序列同源性为99%,与HEV基因型1～8的核苷酸序列同源性分别为76%～77%、78%、76%～79%、85%～86%、77%、80%、79%和75%～79%。其中1株(S18)还扩增出HEV ORF2片段(5994～6297bp),与HEV基因型1～4的核苷酸序列同源性分别为76%～78%、74%、74%～77%、85%～94%。结论 分离的2株猪HEV属于HEV基因型4。更多还原

【Abstract】 Objectives To investigate HEV infection in swine and the genotype relationship between swine and human HEV. Methods Anti-HEV IgG antibody was detected in the sera of swine using enzyme linked-immunoassay (EIA), and HEV RNA was amplified by reverse transcription nested polymerase chain reaction (RT-nPCR). The Vector NTI Suite 7 and TreeView softwares were used for nucleotide sequences phylogenetic analysis of HEV isolated from human and swine. Results The anti-HEV IgG positive rate was 16.67% (18/108). Among the 18 anti-HEV IgG positive sera, 2 sequences (11.11%, called S18 and S43, respectively) of HEV ORF1 (102-387 bp) were amplified, with the identity of 99% between them. They had 76%-77%, 78%, 76%-79%, 85%-86%, 77%, 80%, 79% and 75%-79% homology at the nucleotide level with human HEV genotypes 1-8, respectively. One (S18) of them was also amplified out in ORF2 region (5 994-6 297 bp) and showed 76%-78%, 74%, 74%-77%, and 85%-94% identity with human HEV genotypes 1-4 at the nucleotide level, respectively. Conclusion HEV sequences isolated from swine belong to human HEV genotype 4.更多还原