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The presence of Genogroup II Norovirus in Retail Shellfish from Seven Coastal Cities in China

文献类型： 外文期刊

作者： Ma, Li-ping 1 ; Zhao, Feng 1 ; Yao, Lin 1 ; Li, Xin-guang 1 ; Zhou, De-qing 1 ; Zhang, Rui-ling 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Key Lab Sustainable Utilizat Marine Fisheries Res, Minist Agr, Yellow Sea Fisheries Res Inst, Qingdao 266071, Peoples R China

2.Shanghai Ocean Univ, Coll Food Sci & Technol, Shanghai 201306, Peoples R China

关键词： Norovirus;Shellfish;Real-time RT-PCR;Investigation

期刊名称：FOOD AND ENVIRONMENTAL VIROLOGY （ 影响因子：2.778； 五年影响因子：2.799 ）

ISSN：

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收录情况： SCI

摘要： Noroviruses (NoVs) are commonly occurring pathogens that cause gastroenteritis. Outbreaks of viral diseases have often been ascribed to the consumption of contaminated shellfish. Our objective was to evaluate the presence and contamination levels of NoV in shellfish sold at seafood markets in China. We tested 840 shellfish samples (Crassostrea gigas, Mytilus edulis, Azumapecten farreri, SinoNoVacula constricta, Scapharca subcrenata, Ruditapes philippinarum) that were collected from seven cities around the Yellow and Bohai Seas in China between December 2009 and November 2011. We used real-time RT-PCR to detect NoV in purified concentrates from the stomach and digestive diverticula of these shellfish. NoV was detected in 19.35 % (N = 155), 16.67 % (N= 114), 5.70 % (N = 158), 8.82 % (N = 136), 13.74 % (N = 131), and 16.44 % (N = 146) of oyster, mussel, scallop, razor clam, ark shell, and clam samples, respectively. The average detection rate was 13.33 % (112/840). Nucleotide sequencing of the NoV RT-PCR products demonstrated that all strains belonged to NoV genotype GII.12, except two that belonged to GI.3. More than 102 copies of the NoV genome were detected in 69 of 112 positive shellfish samples. Our results suggest that ~13 % of shellfish harbor NoV, and GII.12 NoV is the primary strain in shellfish purchased at markets in seven coastal cities in China.

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