%0 English Abstract
%T [Monitoring and analysis on host animals of hemorrhagic fever with renal syndrome in Henan Province from 2019 to 2022].
%A Li DX
%A Fan W
%A Zhu L
%A Hu X
%A Li Y
%A Ma HX
%A Wang HF
%A Ye Y
%A Su J
%A Huang XY
%J Zhonghua Yu Fang Yi Xue Za Zhi
%V 58
%N 1
%D 2024 Jan 6
%M 38228545
暂无%R 10.3760/cma.j.cn112150-20230829-00135
%X Objective: To investigate the distribution and hantavirus (HV) carrying state in host animals of hemorrhagic fever with renal syndrome (HFRS) in Henan Province from 2019 to 2022. Methods: Host animal monitoring was carried out at the monitoring sites of HFRS in Henan Province. The real-time fluorescence quantitative PCR was used to detect hantavirus in rat lungs. The types of hantavirus were analyzed. The positive samples were sequenced and then sequence homology and variation were analyzed. Results: A total of 1 308 rodents were captured from 2019 to 2022, 16 specimens of rat lungs tested positive for hantavirus nucleic acid. The positive rate of HV was 1.22% (16/1 308). According to type, the positive rate of HV in Apodius agrarius was the highest (68.75%, 11/16). According to distribution, the positive rate of HV in field samples was the highest (2.50%, 12/480), and the positive rate of HV in residential samples was 0.53% (4/759). The typing results of 16 positive samples showed that all viruses were hantavirus type Ⅰ (hantaan virus). The positive samples were sequenced and eight S gene fragments (GenBank number: OQ681444-OQ681451) and six M gene fragments (OQ681438-OQ681443) were obtained. The S and M gene fragments were similar to the Shaanxi 84FLi strain and Sichuan SN7 strain. Phylogenetic analysis of S and M gene fragments showed that they all belonged to the hantaan virus-H5 subtype. Amino acid sequence analysis revealed that, compared with the hantaan virus vaccine strain 84FLi, the 74th amino acid encoded by eight S fragments was replaced by aspartamide with serine. Tryptophan was replaced by glycine at the 14th position of Gn region in XC2022047, and isoleucine was replaced by alanine at the 359 position of XC2022022 and XC2022024. Conclusion: The hantavirus carried by host animals in Henan Province from 2019 to 2022 belongs to the type Ⅰ (hantaan virus), and Apodemus agrarius is still the dominant host animal of the hantaan virus. Compared with the vaccine strains, amino acid sites are replaced in the immune epitopes of the S and M gene fragments.<BR>目的： 分析2019—2022年河南省肾综合征出血热（HFRS）宿主动物分布及携带汉坦病毒（HV）情况。 方法： 在河南省HFRS监测点开展宿主动物监测，采用实时荧光定量PCR法检测鼠肺HV，分析河南省鼠类动物携带HV型别，对阳性样本进行测序，分析核苷酸序列的同源性及变异情况。 结果： 2019—2022年共捕鼠1 308只，16份鼠肺HV核酸阳性，鼠HV阳性率为1.22%（16/1 308）。按种类，黑线姬鼠HV阳性率最高（68.75%，11/16）。按分布地，野外鼠HV阳性率最高（2.50%，12/480），居民区鼠HV阳性率为0.53%（4/759）。16份阳性样本分型结果显示，所携带的病毒均属于Ⅰ型汉滩病毒。阳性样本测序后获得8条S基因片段（OQ681444~OQ681451）和6条M基因片段（OQ681438~OQ681443）；S和M基因片段与陕西84FLi株、四川SN7 株相似性较高。S和M基因片段系统进化分析显示，均为汉滩病毒H5基因亚型。氨基酸序列分析显示，与汉滩病毒疫苗株84FLi相比，8条S片段编码氨基酸第74位由天冬酰胺替换为丝氨酸；XC2022047株在Gn区第14位由色氨酸替换为甘氨酸，XC2022022和XC2022024第359位由异亮氨酸替换为丙氨酸。 结论： 2019—2022年河南省宿主动物携带HV属于Ⅰ型汉滩病毒，黑线姬鼠仍然是汉滩病毒的优势宿主。同疫苗株比较，S和M基因片段的免疫表位区均有氨基酸位点替换。.