2021-2022监测年度枣庄市乙型流感病毒Victoria系全基因组测序分析Sequencing Analysis of Whole Genome of Influenza B Virus Victoria Lineage in Zaozhuang from 2021 to 2022,China
张亮;张涛;
摘要(Abstract):
为了解山东省枣庄市2021-2022监测年度乙型流感病毒Victoria系的流行情况,分析病毒全基因组遗传特征,了解病毒进化变异特点,分析与疫苗株的相似程度,为流感的防控提供参考依据。从枣庄市流感监测网络实验室分离的流感毒株中随机选取10株B/Victoria系毒株,以WHO推荐的B/Victoria流感疫苗株B/Washington/02/2019(2020-2022北半球疫苗代表株)为参考进行全基因序列测定,利用生物信息学软件构建进化树,并分析分子进化特征。2021年4月-2022年3月,枣庄市流感病毒监测阳性率为17.03%(202/1186),均为B/Victoria系流感。将枣庄市分离的10株B/Victoria系毒株序列与北半球疫苗代表株B/Washington/02/2019相比血凝素(Hemagglutinin,HA)基因核苷酸同源性为99.5%~100%,HA基因氨基酸同源性为99.7%~100%;HA进化树分析中,该10株B/Victoria系毒株与疫苗代表株B/Washington/02/2019同属于1A分支;但发现已有5处抗原表位突变,均发生在120-loop区122位、133位,150-loop区144位、150位,190-loop区197位;神经氨酸酶(NA)未发现关键氨基酸位点变异。NA抑制剂耐药位点均未发生变异,奥司他韦等药物治疗流感敏感。枣庄市2021-2022监测年度流行的流感病毒均为乙型Victoria系,与疫苗推荐株相比HA发生了抗原漂移,提示B/Victoria系疫苗株与本地区流行株的匹配度有所降低。枣庄地区流行的乙型流感病毒对药物奥司他韦和扎那米韦依然敏感。今后继续开展流感病毒分子进化特征监测是重要的,有利于了解乙型流感流行风险,以及对流感疫苗和治疗药物效果的影响。
关键词(KeyWords): 乙型流感病毒;Victoria系;全基因组分析
基金项目(Foundation): 枣庄市科技发展计划(项目号:2021NS57),题目:枣庄地区儿童急性上呼吸道感染病毒流行特征与病原学研究~~
作者(Authors): 张亮;张涛;
DOI: 10.13242/j.cnki.bingduxuebao.004264
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