| Title | Epidemiological Characteristics of Norovirus Outbreaks in Shenyang from 2017 to 2021 |
|---|---|
| Author | Ying Qi1†, Xinxin Dong2†, Xiaowei Cheng2, Han Xu2, Jin Wang2, Bing Wang1, Ye Chen1, Baijun Sun1, Linlin Zhang1, and Yan Yao2* |
| Address | 1Shenyang Center for Disease Control and Prevention, Shenyang 110102, Liaoning, People’s Republic of China, 2Department of Epidemiology and Biostatistics, School of Public Health, Jilin University, Changchun 130021, Jilin, People’s Republic of China |
| Bibliography | Journal of Microbiology, 61(4),471-478, 2023, |
| DOI | 10.1007/s12275-023-00033-9 |
| Key Words | Norovirus · Outbreak · Surveillance · Epidemiology · Shenyang |
| Abstract | Norovirus is one of the leading causes of acute gastroenteritis outbreaks worldwide. This study aimed to identify the epidemiological characteristics of norovirus outbreaks and to provide evidence for public health entities. Specimens and epidemiological survey data were collected to determine if there were differences in the attack rate of norovirus in terms of the year, season, transmission route, exposure setting, and region and to determine whether there were relationships between the reporting interval, the number of illnesses in a single outbreak and the duration of the outbreak. Norovirus outbreaks were reported throughout the year, with seasonal characteristics (i.e., high rates in spring and winter). Among all regions in Shenyang with the exception of Huanggu and Liaozhong, norovirus outbreaks had been reported, and the primary genotype was GII.2[P16]. Vomiting was the most common symptom. The main places of occurrence were childcare institutions and schools. The person-to-person route was the main transmission route. The median duration of norovirus was 3 days (IQR [interquartile range]: 2–6 days), the median reporting interval was 2 days (IQR: 1–4 days), the median number of illnesses in a single outbreak was 16 (IQR: 10–25); there was a positive correlation between these parameters. Norovirus surveillance and genotyping studies still need to be further strengthened to increase knowledge regarding the pathogens and their variant characteristics, to better characterize the patterns of norovirus outbreaks and to provide information for outbreak prevention. Norovirus outbreaks should be detected, reported and handled early. Public health entities and the government should develop corresponding measures for different seasons, transmission routes, exposure settings, and regions. |