Centers for Disease Control and Prevention, Atlanta, Georgia 30333, USA.
Emerg Infect Dis. 2013 Aug;19(8):1231-8. doi: 10.3201/eid1908.130458.
During 2012, global detection of a new norovirus (NoV) strain, GII.4 Sydney, raised concerns about its potential effect in the United States. We analyzed data from NoV outbreaks in 5 states and emergency department visits for gastrointestinal illness in 1 state during the 2012-13 season and compared the data with those of previous seasons. During August 2012-April 2013, a total of 637 NoV outbreaks were reported compared with 536 and 432 in 2011-2012 and 2010-2011 during the same period. The proportion of outbreaks attributed to GII.4 Sydney increased from 8% in September 2012 to 82% in March 2013. The increase in emergency department visits for gastrointestinal illness during the 2012-13 season was similar to that of previous seasons. GII.4 Sydney has become the predominant US NoV outbreak strain during the 2012-13 season, but its emergence did not cause outbreak activity to substantially increase from that of previous seasons.
2012 年，全球范围内检测到一种新型诺如病毒（NoV）株，即 GII.4 悉尼株，这引起了人们对其在美国潜在影响的关注。我们分析了 5 个州在 2012-2013 季节爆发的 NoV 疫情和 1 个州因胃肠道疾病就诊的急诊数据，并将这些数据与前几个季节的数据进行了比较。在 2012 年 8 月至 2013 年 4 月期间，共报告了 637 起诺如病毒疫情，而在 2011-2012 年和 2010-2011 年同期，这一数字分别为 536 起和 432 起。2012 年 9 月，GII.4 悉尼株引起的疫情比例为 8%，到 2013 年 3 月上升至 82%。在 2012-2013 季节，因胃肠道疾病就诊的急诊人数增加与前几个季节相似。GII.4 悉尼株已成为 2012-2013 季节美国主要的诺如病毒爆发株，但它的出现并没有导致疫情活动比前几个季节大幅增加。
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