摘要
目的调查2009--2011年广州诺如病毒的分子流行病学特征。方法分别收集广州市2010年1月至2011年5月的环境水样183份、2009年6月至2011年6月的海产品1162份和2009年7月至2010年12月的腹泻患者粪便标本1066份,以实时荧光定量逆转录PCR(qRT—PCR)检测诺如病毒,对扩增阳性标本测序后与GenBank中的诺如病毒参考株比较,绘制系统进化树。结果环境水样中诺如病毒阳性率为19.67%(36/183),海产品中的阳性率为8.26%(96/1162),腹泻患者粪便标本中的阳性率为37.05%(395/1066);扩增阳性样品中的诺如病毒可分为10株代表株,其中7个代表株(共208份标本)的基因型为G24型,并且水样、海产品和粪便标本同源性很高,相似度达94%~100%。结论广州诺如病毒流行优势株为G24型,同时标本中阳性率较高。
Objective To investigate the molecular epidemiological characteristics of norovirus in Guangzhou from 2009 to 2011. Methods A total of 183 water samples, 1162 seafood samples and 1066 diarrhea stool specimens were collected from January 2010 to May 2011 ,June 2009 to June 2011 and July 2009 to December 2010 respectively in Guangzhou. Norovirus was detected by real time reverse transcript-PCR(qRT-PCR). The partial polymerase gene was amplified from norovirus positive samples,then sequenced and compared with the sequences of norovirus in GenBank. The phylogenetic tree was created. Results The positive rate was 19. 67% (36/183) ,8. 26% (96/1162) and 37. 05% (395/1066) in water samples, seafood and diarrhea patients respectively. Noroviruses from positive samples could be divided into 10 representative strains,in which 7 representative strains of genotype of 208 samples was type G2-4. The sequences from water, seafood and stool specimens were highly homologous with the similarity of 94% - 100%. Conclusion In Guangzhou,the predominant Norovirus genotype was G2-4 and the positive rate of samples was high.
出处
《中华预防医学杂志》
CAS
CSCD
北大核心
2013年第1期40-43,共4页
Chinese Journal of Preventive Medicine
基金
广东省科技计划(20088030303041)
广州市医药卫生科技重点项目(2008-ZDi-13)
关键词
诺罗病毒
分子流行病学
聚合酶链反应
Norovirus
Molecular epidemiology
Polymerase chain reaction