[Analysis of epidemiological characteristics of report cases of rotavirus diarrhea in children under 5 years old in China, 2005-2018].

To analyze the epidemiological characteristics of rotavirus in children under 5 years old in China (excluding China Hong Kong, Macau and Taiwan data, the same below) from 2005 to 2018. Data on other infectious diarrhea in the country from 2005 to 2018 were downloaded from the National Notifiable Disease Report System was to build a database for report cases of rotavirus diarrhea in children under 5 years of age, and descriptive epidemiological methods were used to analyze the data. In 2005-2018, a total of 820 588 cases of rotavirus infection in children under 5 years old were reported nationwide, with male 500 944 cases, and with an average annual incidence of 63.7/100 000. The reported incidence showed a fluctuating upward trend increased from 8.4/100 000 to 178.1/100 000. The number of reporting provinces increased from 17 to 30. The reported incidence showed a peak of season from November to following February. The reported cases of rotavirus diarrhea in children under 5 months of age was 13.1%(107 845 cases), and the high-incidence age ranged from 6 months to 2 years old, accounting for 70.3% (576 874 cases), with a peak of 11-13 months (163 947 cases). The top three provinces (cities) reporting the incidence rate were Zhejiang (535.2/100 000), Guangdong (334.3/100 000) and Beijing (317.3/100 000), the provinces with the low reported case rates were Shanxi (0.9/100 000), Heilongjiang (1.6/100 000) and Liaoning (2.5/100 000), but there was no case reported in Tibet; The report cases of south region (745 526 cases) were 9.9 times north region (74 935 cases).The cases of rotavirus infection and other diarrhea pathogens were detected simultaneously accounted for 1.8% (15 030 cases) and mainly were positive for rotavirus and adenovirus (90.1%, 13 544 cases). The rate of rotavirus infection in children has increased rapidly since the age of 6 months, and 84.4% of the reported cases were infants before the age of 2 years.