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Analysis of epidemic characteristics and related factors of norovirus in diarrhea patients in Guangxi, 2015-2020
China Tropical Medicine ; 23(2):146-150, 2023.
Article in Chinese | CAB Abstracts | ID: covidwho-2288907
ABSTRACT
To analyze the epidemiological characteristics and related factors of norovirus in Guangxi from 2015 to 2020, and to provide scientific recommendations for norovirus prevention and control. Methods The foodborne diseases surveillance data were collected from 11 sentinel hospitals through the National Foodborne Disease Monitoring and Reporting System from 2015 to 2020. R software with version 4.0.3 was used for descriptive and statistical analysis, including epidemic curve, chi-square test, and trend chi-square and so on. Logistic regression was used to analyze norovirus-related factors, OR values and 95% confidence intervals were calculated respectively with the statistical test level of P < 0.05. Results There were 1 008 norovirus cases detected, with a detection rate of 12.75% (1 008/7 903). Children with age less than 5 years (OR=1.43, 95%CI 1.13-1.82) and patients at age 20-45 (OR=1.45, 95%CI 1.13-1.87) were high risk population. The detection rate was higher in autumn (OR=1.29, 95%CI 1.08-1.53) but lower in summer (OR=0.67, 95%CI 0.55-0.80). In addition, the tourist area (Guilin City) presented a higher detection rate than other areas (OR=1.41, 95%CI 1.10-1.80). Aquatic products (OR=1.40, 95%CI 1.03-1.91), meat and dairy products (OR=1.31, 95%CI 1.06-1.61) were high-risk foods for norovirus infection. The prevention and control policies of COVID-19 can reduce the possibility of norovirus by 61% (OR=0.39, 95%CI 0.31-0.49) showed a declining trend (Trend X2=85.33, P < 0.001). In addition, prolonged visit time can lead to 19%-23% decrease in the detection rate of norovirus (OR24-48 hours=0.81, 95%CI 0.70-0.95;OR>48 hours=0.77, 95%CI 0.63-0.93). Conclusions The epidemic of norovirus presented seasonal and regional distribution in Guangxi with a declining detection rate trend in diarrhea patients during recent 6 years. Young children were high-risk population in infection norovirus. The intake of seafood can increase the risk of norovirus infection. The prevention and control policies of COVID-19 can sharply decrease the possibility of infection norovirus. The monitoring of key foods such as seafood should be strengthened, and the early screening of suspected cases should be taken. The norovirus monitoring should be improved to ensure the health of the population.
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Full text: Available Collection: Databases of international organizations Database: CAB Abstracts Language: Chinese Journal: China Tropical Medicine Year: 2023 Document Type: Article

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Full text: Available Collection: Databases of international organizations Database: CAB Abstracts Language: Chinese Journal: China Tropical Medicine Year: 2023 Document Type: Article