江苏省2011年流行性腮腺炎病毒分子流行病学分析

目的:分离江苏省2011年流行性腮腺炎病毒(Mumps Virus,MuV),并分析其基因特征。方法:对江苏省2011年腮腺炎咽拭子进行病毒分离,对MuV分离株针对SH基因进行PCR扩增,并对该PCR产物进行序列测定,结合从基因库下载的中国MuV毒株序列以及世界卫生组织(WHO)MuV基因型参考株一起进行分子流行病学研究。结果:通过比较核苷酸和氨基酸同源性和构建亲缘关系树发现,江苏省2011年MuV分离株属F基因型,但序列相互间存在差异。此外,通过分析江苏省2011年MuV分离株的遗传距离发现,MuV毒株序列同源性和亲缘关系树分析结果一致。结论:江苏省2011年流行的MuV同属F基因型,是由F基因型MuV的多个传播链引起的。并且2011年的MuV毒株间存在序列差异,说明在江苏省流行的MuV发生了一定程度的变异。     

江苏省2014年流行性腮腺炎病毒基因特征分析

目的分析江苏省2014年流行性腮腺炎病毒(MuV)的基因特征。方法采用Vero/SLAM细胞分离流行性腮腺炎病毒,采用RT-PCR法对25株MuV分离株的小疏水蛋白(Small Hydrophobic Protein,SH)基因片段进行扩增和序列测定,结合WHO MuV参考株进行分子流行病学研究。结果通过比较核苷酸和氨基酸同源性和构建亲缘关系树发现,江苏省2014年25株MuV分离株同属F基因型,但序列间存在差异。核苷酸和氨基酸同源性分别为94.0%~100.0%和84.9%~100.0%。MuV分离株在SH基因编码的氨基酸保守位点也发生了变化。结论江苏省2014年流行的MuV基因型同属F基因型,为F基因型MuV的多个传播链引起,但与F基因型参考株序列差异较大,发生了一定程度变异。     

2015-2019年湖北省流行性腮腺炎病例腮腺炎病毒基因特征

目的分析2015-2019年湖北省流行性腮腺炎(流腮)病例的腮腺炎病毒(Mumps virus, MuV)基因特征。方法收集2015-2019年湖北省流腮病例咽拭子标本,采用荧光定量RT-PCR方法检测MuV核酸、扩增SH基因并进行序列分析;对核酸阳性标本进行MuV分离培养,对分离株进行全基因序列分析。结果共获得22例流腮病例的MuV SH基因序列,其中16例为F基因型(2015年11例、2017年4例、2019年1例),6例为G基因型(均为2019年病例);分离到6株MuV毒株,其中5株为F基因型,1株为G基因型。16株F基因型MuV和6株G基因型MuV的SH基因核苷酸同源性分别为94.9%-100%和99.4%-100%。6株MuV分离株与中国疫苗株S79和Jeryl-lynn株的核苷酸同源性为92.9%-93.1%。结论 2015-2019年湖北省MuV优势基因型为F基因型,2019年首次发现G基因型且为当年流行优势株。需继续开展病原学监测,为流腮防控提供实验室依据。     

江苏省2012年麻疹病毒的基因特征分析

目的对江苏省2012年麻疹病毒(measles virus,MV)进行分离,并分析其基因特征。方法对江苏省2012年麻疹咽拭子进行病毒分离,麻疹病毒分离株针对N基因进行PCR扩增,并对该PCR产物进行序列测定,结合从基因库下载的中国MV毒株序列以及世界卫生组织(WHO)MV基因型参考株一起进行分子流行病学研究。结果通过比较核苷酸和氨基酸同源性和构建亲缘关系树发现,江苏省2012年MV分离株属H1a基因型,但序列相互间存在差异。此外,通过分析江苏省2012年MV分离株的遗传距离发现,MV毒株序列同源性和亲缘关系树分析结果一致。结论江苏省2012年流行的麻疹同属H1a基因型,是由H1a基因型MV的多个传播链引起的;且MV毒株间存在序列差异,说明在江苏省流行的MV发生了一定程度的变异。     

2018年广西壮族自治区防城港市流行性腮腺炎疫情K基因型病毒SH基因特征北大核心

目的分析2018年广西壮族自治区防城港市流行性腮腺炎(流腮)疫情中K基因型腮腺炎病毒(Mumps virus,MuV)分离株的SH基因特征。方法从2018年防城港市小学流腮疫情中采集病例血清和口腔拭子,分别采用酶联免疫吸附试验和实时荧光逆转录-聚合酶链反应检测MuV IgM/IgG抗体和核酸,对阳性核酸样本的SH基因进行扩增和测序,分析其基因特征。结果在采集样本的流腮病例中,MuV IgM、IgG抗体阳性率分别为68.2%(15/22)、100%(22/22),MuV核酸阳性率为80.8%(21/26)。选取10株MuV进行SH基因核苷酸序列分析,经鉴定均为K基因型,核苷酸同源性为99.6%-100%;其与2016年中国广西和越南K基因型株、中国S79疫苗株的核苷酸同源性分别为99.0%-99.6%、84.4%-84.8%。MuV分离株的某些氨基酸位点发生了突变。结论2018年广西防城港市流腮疫情为K基因型MuV引起;与越南K基因型MuV亲缘关系密切。需加强中越边境地区含腮腺炎成分疫苗接种和流腮监测处置工作。     

2011年陕西省流行性腮腺炎病毒株基因型别分析

目的了解陕西省流行性腮腺炎病毒株（mumpsvirus，MuV）的基因型别。方法采集腮腺炎病人咽拭子标本分离病毒，对分离到的MuV小疏水蛋白（smallhydrophobicprotein，SH）基因316个核苷酸片段进行逆转录-聚合酶链反应（reverse transeription-polymerase chain reaction，RT—PCR）扩增，对扩增产物进行序列测定和基因分型。结果从47份腮腺炎病人咽拭子标本中分离出腮腺炎病毒10株，分离率为21．3％，其中5株为F基因型，5株为G基因型。结论F基因型、G基因型两种腮腺炎病毒在陕西省流行。     

2004年、2007年山东省暴发点分离的流行性腮腺炎病毒株SH基因序列分析

[目的]探讨山东省流行性腮腺炎病毒（MuV）流行株的基因型分布及变异情况。[方法]2004年、2007年,分别从1个流行性腮腺炎暴发点中,采集疑似病例血清标本进行实验室早期诊断,同时采集患者腺管分泌液进行病毒分离,并将分离的病毒株进行SH基因序列分析。[结果]2004年（2株）、2007年（3株）分离的5株MuV野毒株均为F基因型,各株间核苷酸最大差异为3.9% 与F基因型代表株WLZ1CNA95（兰州）、WSJ1CNA9（上海）核苷酸的最大差异分别为3.9%、7.7% 与其他各型（B～L）的核苷酸最大差异为17.7% 与疫苗株的基因差异为17.4%。[结论]2004年以来,山东省流行的MuV优势株为F基因型,未发现病毒基因型间变异,基因型内变异趋势明显。     

江西省流行性腮腺炎病毒基因特征分析

目的了解江西省流行性腮腺炎病毒(MuV)的基本特征。方法采集腮腺炎患者咽拭子标本分离病毒,对分离到的MuV小疏水蛋白(small hydrophobic protein,SH)基因316个核苷酸片段进行逆转录PCR(RT-PCR)扩增,对扩增产物进行序列测定及基因分型。结果江西省27株Mu V分离株属于F基因型,核苷酸及氨基酸同源性分别为94.6%~100%和89.5%~100%。与F基因型参考株序列相比,与兰州株的氨基酸同源性为91.2%~94.7%,与上海株的氨基酸同源性为84.2%~87.7%。Mu V的F基因型毒株呈现特异性突变(C~(Nt65)、C~(Nt105)、G~(Nt137)、C~(Nt192)、C~(Nt239));在与基因分型有关的氨基酸三联体上,有1株为VML,1株为ILL,其余均为IML。结论江西省目前腮腺炎病毒流行株优势基因型为F基因型。现有的F基因型Mu V流行株与A基因型疫苗株S79差异较大。氨基酸三联体已出现变异,因此需继续加强本省腮腺炎病毒监测的基因型监测。     

江苏省2013年流行性腮腺炎病毒的基因特征分析

目的分析江苏省2013年流行性腮腺炎病毒(Mu V)的基因特征。方法针对2013年分离到的139株Mu V小疏水蛋白(small hydrophobic protein,SH)基因316个核苷酸片段进行反转录-聚合酶链反应(RT-PCR)扩增,并对该PCR产物进行序列测定,将139株Mu V与世界卫生组织(WHO)Mu V基因型参考株一起进行分子流行病学研究。结果江苏省136株Mu V分离株属于F基因型,核苷酸和氨基酸同源性分别为93.4%~100%和84.3%~100%。3株Mu V分离株属于G基因型,核苷酸和氨基酸同源性分别为95.6%~100%和93%~100%。Mu V分离株在SH基因编码的氨基酸保守位点也发生了变化。结论江苏省2013年主要流行的Mu V基因型为F基因型,同时也出现G基因型的流行,Mu V毒株与疫苗株S79遗传距离差异较大。F基因型参考株与江苏省2013年的F基因型Mu V毒株间序列差异较大,说明江苏省流行的Mu V发生了一定程度的变异。另外,还发现所有F基因型和G基因型Mu V在SH基因上分别存在5个特异性突变,而其他基因型Mu V在这些位点上均未发生改变。     

云南省2007--2009年流行性腮腺炎病毒SH和HN基因的遗传特征分析

目的 分析2007-2009年云南省腮腺炎病毒(MuV)分离株的SH和HN遗传特征.方法 采用反转录-聚合酶链反应从Vero细胞分离的病毒株基因组中扩增出SH基因和HN基因,测序后用Mega4.1软件分析其遗传特征.结果 云南省分离14株MuV的SH基因其核苷酸和氨基酸同源性为98.3%～100.0%和96.5%～100.0%,与其他省份比较其同源性为92.6%～99.4%和87.7%～100.0%,其中Wsh1和Wsh2与其他F基因型差异较大;与疫苗株同源性为84.5%～85.1%和77.2%;与其他基因型同源性为83.4%～90.9%和70.1%～86.0%.6株MuV分离株的HN基因与核苷酸和氨基酸同源性分别为99.3%～99.5%和99.1%～99.7%;与中国分离株SP株的核苷酸和氨基酸同源性均为99.8%;与其他基因型同源性为94.7%～96.8%和95.5%～99.1%;与疫苗株的同源性为92.4%～93.2%和95.5%～96.4%.结论 2007-2009年云南省流行的MuV均为F基因型;其HN基因比SH基因保守.

Abstract：

Objective To analyze genetic characterization of the small hydrophobic and hemagglutinin-neuraminidase genes of mumps virus(MuV)isolated in Yunnan province,China from 2007 to 2009.Methods Fourteen MuV strains were isolated in Yunnan,China from 2007 to 2009.Using RT-PCR,the SH gene fragments contained 316 nucleotides in all strains and HN gene of six strains were sequenced.The sequences were aligned with other mumps virus sequences downloaded from GenBank using Mega 4.1 software.Results Fourteen isolated strains were closely related to other reference strains of F genotypes.In SH gene,the homology of nucleotide and amino acid among the fourteen isolated strains were 98.3%-100.0%and 96.5%-100.0%,respectively,and 92.6%%-99.4%and 87.7%-100.0% of homology when compared with that of strains isolated from other provinces in China,respectively.Wsh1 and Wsh2 strains had less homology when compared to other strains of F genotypes.The fourteen strains had homology of 84.5%-85.1%and 77.2%compared to vaccine strains on nucleotide and amino acid,respectively,and had homology of 83.4%-90.9% and 70.1%-86.0% compared to that of other genotypes.In HN gene,the homology of nucleotide and amino acid among the six isolated strains were 99.3%-99.5% and 99.1%-99.7%,respectively,and also 99.8% and 99.8% of homology respectively when compared to the SP strain in China.All the six strains had homology of 92.4%-93.2% and 95.5%-96.4% when compared to the vaecine strains on nucleotide and amino acid,respectively,and had homology of 94.7%-96.8% and 95.5%-99.1%compared to other genotypes.Conclusion Fourteen strains isolated in Yunnan from 2007 to 2009belonged to F genotype of MuV while the HN gene seemed more conservative than SH gene.     

北京地区流行性腮腺炎野病毒与疫苗病毒基因特征比较

目的 比较北京地区流行性腮腺炎病毒流行株和疫苗株的基因特征,初步分析疫苗效果不佳的原因.方法 通过病例免疫史分析、病毒分离鉴定、SH基因序列分析,与其他基因型参考株进行同源性比较及血凝素-神经氨酸酶(HN)基因氨基酸关键位点变异分析.结果 病毒分离阳性病例共38例,其中IgM阴性7例.在2007和2008年,病毒分离率、RT-PCR阳性率、IgM抗体阳性率都有明显下降,同时有免疫史的病例增多.实验证明无免疫史的病例病毒分离和IgM抗体阳性率更高.38株病毒均属于F基因型,疫苗株属于A基因型.SH基因流行株之间核苷酸最大差异为5.6%,与疫苗株的差异为16.0%～18.1%.部分北京株SH蛋白中保守的疏水性氨基酸发生变化,如第8位:6株L→F.各流行株之间FIN蛋白氨基酸序列最大差异为2.3%,与疫苗株差异为4.2%～5.3%.在HN上决定交叉中和能力的氨基酸位点,北京株与疫苗株存在差异,如在354位和356位,所有北京株与疫苗株都不同.北京株在HN上的N-糖基化位点也和疫苗株存在差异,如在464～466位置上为NCS,疫苗株为NCR.另有18个未知功能的氨基酸位点,所有北京株与疫苗株不同.结论 近年北京地区流行的腮腺炎病毒优势株为F基因型,未发现基因型间变异,已存在较大型内差异.北京株和疫苗株在SH和HN蛋白上都存在较大差异.     

四川省首株腮腺炎病毒的分离

目的 为了解四川省腮腺炎病毒的基因特征,以填补四川省空白.方法 采集四川隆昌县腮腺炎暴发疫情中部分病例的咽拭子标本,进行病毒分离和核苷酸测序后,与腮腺炎病毒参考株SH基因序列做进化树分析.结果 该病毒分离株与F基因型参考株聚集在同一进化分枝上,bootstrap值为96％.与F基因型参考株的核苷酸和氨基酸序列同源性分别为96.8％ ～ 93.4％和94.7％～87.7％;与其他12个基因型参考株的核苷酸和氨基酸序列同源性分别为91.8％ ～ 84.2％和86％ ～71.9％.结论 该病毒分离株为F基因型腮腺炎病毒,即四川隆昌县腮腺炎暴发疫情流行是由F基因型腮腺炎病毒引起的.     

Analysis of the genetic variability of the mumps SH gene in viruses circulating in the UK between 1996 and 2005

Genetic analysis (genotyping) of mumps viruses has been applied to the molecular epidemiology of mumps for over 10 years in the UK. To explore further the variation of mumps strains over time, in total, 965 sequences of the entire SH gene were analysed and compared, including 954 mumps virus strains collected in the UK between 1996 and 2005 were characterised as genotypes G2 (426), G5 (369), J (157) and F (2), which were compared with 11 F sequences found in China. Phylogenetic trees drawn for G2, G5 and J sequences showed that the diversities were greater between the sequences in earlier years (before 2001/2002) than those in later years and could be divided into two clusters within each of the three genotypes over the 10-year period. One transmission of G2, G5 and a J strain was sustained from earlier years with mutations and eventually became predominant strains. Divergences amongst the same genotype or sub-genotype was up to 4.6% for G2, 5.3% for G5 and 4.9% for J. Mutation rates per site per year based on the 316 nt of SH gene were 0.94, 1.3, 0.96 and 1.86 × 10^?2 for G2, G5, J and F respectively. The ratio of d_N/d_S was 0.556, 0.909, 0.357 and 0.811 calculated based on the sequences of G2, G5, J and F respectively. The results revealed that the possible mumps evolution process based on the SH gene was not driven by positive selection during the 10 years between 1996 and 2005.     

Optimizing molecular surveillance of mumps genotype G viruses

Mumps viruses continue to cause sporadic cases and outbreaks in countries with a high vaccination coverage for mumps. Molecular surveillance of mumps viruses can be supportive to elucidate the origin and transmission routes of mumps virus in case of an outbreak. Currently, molecular surveillance is worldwide primarily focused on sequencing of the small hydrophobic (SH) gene. However, few studies have already shown that additional genes or regions contribute to the resolution of the sequence data in such a way that mumps cases that seem to be linked to the same source on basis of the SH sequence, appear to be linked to another source or chain of transmission. Notably, this sequence information was recently extracted from the hemagglutinin-neuraminidase (HN) and fusion (F) genes (total 3364 nucleotides), or from the sum of the three non-coding regions (NCRs; total 1954 nt) between the nucleocapsid protein, phosphoprotein, matrix protein and F protein, but also from the complete genome. Here, sequence data from NCRs were compared with that of the HN and F gene, using mumps genotype G viruses detected in the Netherlands between 2010 and 2018. Results of this study indicate that NCRs sequence data provided similar or slightly better sequence resolution compared to the HN and F genes for most viruses. For molecular surveillance of currently circulating mumps genotype G viruses is sequencing of SH in combination with NCRs currently a useful approach.     

13株中国麻疹野病毒血溶素蛋白基因特征分析

目的分析1999～2003年中国（未包括香港、澳门特别行政区和台湾地区,下同）流行的H,基因型麻疹野病毒代表株血溶素蛋白（Fusion Protein,F）基因的分子特征。方法从1999～2003年中国分离的麻疹野病毒株中,选取13株H1基因型代表株,包括H1a基因亚型麻疹野病毒8株和H1b基因亚型麻疹野病毒5株。使用逆转录一聚合酶链反应扩增病毒的F基因全长,并进行核苷酸序列测定,同时与中国疫苗株及其它国家的A、D2、D6、D7、E基因型参考株进行序列比对及基因亲缘性关系分析。结果1999～2003年13株中国流行麻疹野病毒代表株中,核苷酸同源性为98．1％～99．0％,氨基酸同源性为98．1％～100．0％,与中国疫苗株沪191相比,其核苷酸同源性为95．7％～96．2％,氨基酸同源性为96．9％～97．2％;而与其它基因型相比,核苷酸同源性为94．4％～96．2％。F基因3个糖基化位点（第32、64、70位氨基酸）、对病毒融合功能起着重要作用的第112位精氨酸、第195位亮氨酸未发生改变。结论1999～2003年中国流行的H1基因型麻疹野病毒的F基因无明显差异,F蛋白上已知的重要功能位点未发生变异,推测中国流行的麻疹野病毒F蛋白的结构和功能未发生较大改变,但由于F蛋白是重要的功能蛋白,对F蛋白核苷酸和氨基酸的变异规律进行常规监测,对了解麻疹野病毒流行特点及其遗传变异规律具有重要意义。     

Genomic characterization of mumps viruses from a large-scale mumps outbreak in Arkansas, 2016

In 2016, a year-long large-scale mumps outbreak occurred in Arkansas among a highly-vaccinated population. A total of 2954 mumps cases were identified during this outbreak. The majority of cases (1676 (57%)) were school-aged children (5–17 years), 1536 (92%) of these children had completed the mumps vaccination schedule. To weigh the possibility that the mumps virus evaded vaccine-induced immunity in the affected Arkansas population, we established a pipeline for genomic characterization of the outbreak strains. Our pipeline produces whole-genome sequences along with phylogenetic analysis of the outbreak mumps virus strains. We collected buccal swab samples of patients who tested positive for the mumps virus during the 2016 Arkansas outbreak, and used the portable Oxford Nanopore Technology to sequence the extracted strains. Our pipeline identified the genotype of the Arkansas mumps strains as genotype G and presented a genome-based phylogenetic tree with superior resolution to a standard small hydrophobic (SH) gene-based tree. We phylogenetically compared the Arkansas whole-genome sequences to all publicly available mumps strains. While these analyses show that the Arkansas mumps strains are evolutionarily distinct from the vaccine strains, we observed no correlation between vaccination history and phylogenetic grouping. Furthermore, we predicted potential B-cell epitopes encoded by the Arkansas mumps strains using a random forest prediction model trained on antibody-antigen protein structures. Over half of the predicted epitopes of the Jeryl-Lynn vaccine strains in the Hemagglutinin-Neuraminidase (HN) surface glycoprotein (a major target of neutralizing antibodies) region are missing in the Arkansas mumps strains. In-silico analyses of potential epitopes may indicate that the Arkansas mumps strains display antigens with reduced immunogenicity, which may contribute to reduced vaccine effectiveness. However, our in-silico findings should be assessed by robust experiments such as cross neutralization assays. Metadata analysis showed that vaccination history had no effect on the evolution of the Arkansas mumps strains during this outbreak. We conclude that the driving force behind the spread of the mumps virus in the 2016 Arkansas outbreak remains undetermined.     

Complete genome sequence of mumps viruses isolated from patients with parotitis,pancreatitis and encephalitis in India

Limited information is available regarding epidemiology of mumps in India. Mumps vaccine is not included in the Universal Immunization Program of India. The complete genome sequences of Indian mumps virus (MuV) isolates are not available, hence this study was performed. Five isolates from bilateral parotitis and pancreatitis patients from Maharashtra, a MuV isolate from unilateral parotitis patient from Tamil Nadu, and a MuV isolate from encephalitis patient from Uttar Pradesh were genotyped by the standard protocol of the World Health Organization and subsequently complete genomes were sequenced. Indian MuV genomes were compared with published MuV genomes, including reference genotypes and eight vaccine strains for the genetic differences. The SH gene analysis revealed that five MuV isolates belonged to genotype C and two belonged to genotype G strains. The percent nucleotide divergence (PND) was 1.1% amongst five MuV genotype C strains and 2.2% amongst two MuV genotype G strains. A comparison with widely used mumps Jeryl Lynn vaccine strain revealed that Indian mumps isolates had 54, 54, 53, 49, 49, 38, and 49 amino acid substitutions in Chennai-2012, Kushinagar-2013, Pune-2008, Osmanabad-2012a, Osmanabad-2012b, Pune-1986 and Pune-2012, respectively. This study reports the complete genome sequences of Indian MuV strains obtained in years 1986, 2008, 2012 and 2013 that may be useful for further studies in India and globally.     

Cross-neutralization between vaccine and circulating wild-type mumps viruses in Korea

Mumps is a contagious disease caused by the mumps virus. It can be prevented using mumps vaccines, administered as a measles-mumps-rubella (MMR) vaccine. For first and second dose immunization, children aged 12–15 months and 4–6 years have been administered this vaccine since 1997 in Korea. Nevertheless, mumps outbreaks still occur in vaccinated populations worldwide. Hence, immunity against these diseases may be attenuated, or there are antigenic differences between currently available vaccine strains and circulating wild-type viruses. After the introduction of national immunization programs in Korea, mumps cases became sporadic. Viral genotypes F, H, and I have emerged since 1998 whereas the vaccine strains belong to genotype A. Here, we compared the amino acid sequences of the haemagglutinin-neuraminidase (HN) gene from wild-type viruses and the mumps vaccine and measured the cross-neutralization titers between them. We selected the F, H, and I wild-type mumps strains circulating in Korea from 1998 to 2016 and analyzed changes in the amino acid sequence of the protein encoded by the HN gene. We measured mumps virus-specific IgG and rapid focus reduction neutralization test (FRNT) titers in Korean isolates and sera obtained from 50 children aged 1–2 years who had been administered a single dose of MMR vaccine. Analysis of the HN protein sequences disclosed no changes in the glycosylation sites but did reveal 4–5 differences between the Korean isolates and the genotype A vaccine strain in terms of the neutralizing epitope sites on their HN proteins. Post-vaccination FRNT titers were significantly lower against genotypes F, H, and I than they were against genotype A. This finding highlights the possibility of a recurrence of mumps outbreaks in vaccinated populations depending on the degree of genetic conservation of the HN gene. Further research into this issue is needed to prevent the resurgence of mumps.     

一起流行性腮腺炎爆发的血清学诊断和基因型别鉴定

目的对一起流行性腮腺炎(腮腺炎)爆发进行血清学证实,鉴定引起病毒性脑膜炎的腮腺炎病毒基因型别。方法用酶联免疫吸附试验(ELISA)检测临床诊断为腮腺炎患儿的血清和脑膜炎病人脑脊液(CSF)标本中的IgM抗体;从脑膜炎病人CSF标本中提取核糖核酸(RNA),用逆转录-套式聚合酶链反应(RT-Nest-PCR)方法扩增病毒小疏水蛋白(SH)基因255个核苷酸片段;序列测定结果与GenBank的8个基因型代表株做亲缘性关系树分析。结果15份血清中11份腮腺炎IgM阳性,5份CSF中2份IgM阳性。5份CSF标本中2份PCR扩增产物阳性。SH基因序列测定和分析表明该2株病毒为F基因型,与1995~1996年中国流行的腮腺炎野病毒基因型一致。结论此次疫情是由F基因型腮腺炎病毒引起的腮腺炎爆发,部分病例合并有病毒性脑膜炎。