Multiprefectural spread of gastroenteritis outbreaks attributable to a single genogroup II norovirus strain from a tourist restaurant in Nagasaki, Japan

被引:19
作者
Hirakata, Y [1 ]
Arisawa, K
Nishio, O
Nakagomi, O
机构
[1] Nagasaki Univ, Sch Med & Dent, Dept Lab Med, Nagasaki 8528501, Japan
[2] Nagasaki Univ, Grad Sch Biomed Sci, Dept Mol Microbiol & Immunol, Nagasaki, Japan
[3] Natl Inst Infect Dis, Infect Dis Surveillance Ctr, Tokyo, Japan
关键词
D O I
10.1128/JCM.43.3.1093-1098.2005
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
A series of gastroenteritis outbreaks caused by noroviruses (NVs) among tourist groups from several prefectures was associated with eating a lunch prepared by a restaurant in Nagasaki City, Japan, on 18 and 19 November 2003. A retrospective cohort study was performed to estimate the magnitude of the outbreak and identify the source of infection. Epidemiological information was obtained through the local public health centers in the areas where the illness occurred. Stool and vomit specimens and food and environmental samples were analyzed by reverse transcription-PCR with genogroup-specific primers. Positive samples were sequenced and analyzed phylogenetically. Of 1,492 tourists who ate a lunch prepared by the restaurant during the 2-day period, 660 (44.2%) developed illness, with an average incubation time of 31.2 h. Whereas NVs were not detected in any food samples, identical sequences most closely related to the Mexico genotype of genogroup 11 NV were found in specimens from case patients, restaurant staff, and the kitchen table. Food handlers were concluded to be the source of the outbreak as a result of the contamination of several meals. The series of outbreaks described here exemplifies the role of tourism as a contemporary way to distribute a single infectious agent to multiple and geographically remote areas.
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收藏
页码:1093 / 1098
页数:6
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