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. 2020 Mar;26(3):437-445.
doi: 10.3201/eid2603.191183.

Norovirus Outbreak Surveillance, China, 2016-2018

Miao Jin, Shuyu Wu, Xiangyu Kong, Huaping Xie, Jianguang Fu, Yaqing He, Weihong Feng, Na Liu, Jingxin Li, Jeanette J Rainey, Aron J Hall, Jan Vinjé, Zhaojun Duan

Norovirus Outbreak Surveillance, China, 2016-2018

Miao Jin et al. Emerg Infect Dis. 2020 Mar.

Abstract

CaliciNet China, a network of provincial, county, and city laboratories coordinated by the Chinese Centers for Disease Control and Prevention, was launched in October 2016 to monitor the epidemiology and genotype distribution of norovirus outbreaks in China. During October 2016-September 2018, a total of 556 norovirus outbreaks were reported, and positive fecal samples from 470 (84.5%) outbreaks were genotyped. Most of these outbreaks were associated with person-to-person transmission (95.1%), occurred in childcare centers or schools (78.2%), and were reported during November-March of each year (63.5%). During the 2-year study period, 81.2% of all norovirus outbreaks were typed as GII.2[P16]. In China, most norovirus outbreaks are reported by childcare centers or schools; GII.2[P16] is the predominant genotype. Ongoing surveillance by CaliciNet China will provide information about the evolving norovirus genotype distribution and outbreak characteristics important for the development of effective interventions, including vaccines.

Keywords: China; Norovirus; acute gastroenteritis; enteric infections; outbreak; surveillance; viruses.

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Figures

Figure 1
Figure 1
Geographic location of participating local Centers for Disease Control and Prevention in CaliciNet China, October 2016–September 2018. Star indicates provincial/municipality laboratories; circle, city laboratories; triangle, district/county laboratories. Laboratories that participated in CaliciNet China: black, April 2016; blue, April 2017.
Figure 2
Figure 2
Monthly distribution of norovirus outbreaks reported to CaliciNet China, October 2016–September 2018.
Figure 3
Figure 3
Genotype distribution of 470 norovirus outbreaks reported to CaliciNet China, October 2016–September 2018. No outbreaks were reported in August 2017.
See this image and copyright information in PMC

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