目的 了解云南省景洪市2023年登革病毒基因型特征,为当地登革热防治提供参考。方法 2023年7月13日-2023年8月4日在西双版纳傣族自治州(西双版纳)人民医院采集疑似登革热患者血清样本,通过细胞培养分离病毒,将分离的病毒进行反转录-聚合酶链式反应扩增登革病毒E基因并测序分析,采用MEGA 11.0软件构建进化树。结果 2023年共采集134份疑似登革热患者血清样本,其中登革病毒核酸阳性127份,血清型均为登革病毒1型。细胞培养分离出13株登革病毒株,根据E基因序列分析为基因Ⅰ型,与2023年广州(PP563955.1)和瑞丽(RL23-83)流行株比较,同属一个分支,序列相似性为99.90%~100%;与2019年柬埔寨(OQ678099.1)和印度尼西亚流行株(ON584400.1)的核苷酸相似性为99.00%~99.10%。结论 2023年景洪市登革热疫情主要由登革病毒1型(基因Ⅰ型)引起,可能与广州和瑞丽市流行的登革病毒来源相似,建议相关部门加强对登革病毒的监测。
张军玉, 李丽华, 陈润, 袁丽容, 杨文志, 詹红梅, 曾芬, 杨淑娟, 彭燕, 陈小娟, 周红宁, 高国一
. 云南省景洪市2023年登革病毒基因型分析[J]. 中国媒介生物学及控制杂志, 2025
, 36(2)
: 148
-152
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DOI: 10.11853/j.issn.1003.8280.2025.02.002
Objective To investigate the genotypic characteristics of dengue viruses in Jinghong of Yunnan Province, China, 2023, so as to provide a reference for local prevention and control of dengue fever. Methods From July 13, 2023 to August 4, 2023, serum samples of suspected dengue fever patients were collected at the Xishuangbanna Dai Autonomous Prefecture People's Hospital. Viruses were isolated by cell culture. The Dengue virus envelope gene was amplified via reverse transcription-polymerase chain reaction and sequenced. A phylogenetic tree was constructed using MEGA 11.0 software. Results In 2023, a total of 134 serum samples were collected from patients with suspected dengue fever, of which 127 were positive for Dengue virus nucleic acids, all of which were identified as Dengue virus type 1. Thirteen Dengue virus strains were isolated by cell culture. Based on the envelope gene sequence analysis, they were classified as genotype Ⅰ, which belonged to the same branch as the epidemic strains in Guangzhou (PP563955.1) and Ruili (RL23-83) in 2023, with sequence similarity of 99.90%-100%. The nucleotide similarity with the epidemic strains in Cambodia (OQ678099.1) and Indonesia (ON584400.1) in 2019 was 99.00%-99.10%. Conclusions The dengue fever epidemic in Jinghong in 2023 was mainly caused by dengue virus type 1 (genotype Ⅰ), which is likely to have a similar origin to the strains epidemic in Guangzhou and Ruili. It is recommended that relevant departments should strengthen the surveillance of dengue viruses.
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