ANALYSIS OF THE INCIDENCE OF ACUTE INTESTINAL INFECTIONS OF VIRAL ETIOLOGY IN THE OMSK REGION

The aim of the research. to analyze the incidence of acute intestinal infections in the Omsk region, identifying the proportion of viral diarrhea in individuals under 17 years of age.

Materials and methods. The main reporting forms of Rospotrebnadzor for the period from 2017 to 2023 were used. Descriptive statistics methods and dynamic series analysis were applied. A forecast was built.

Results. In the region, acute intestinal infections often remain of unknown origin. Among acute intestinal infections with an established cause, persons under 17 years of age accounted for more than 70,0%. When building a forecast, it was revealed that the situation will not change for 2024.

Of the identified causes of diarrheal syndrome, viruses such as rotavirus, Norwalk, and enterovirus were most often recorded. Over seven years, the share of rotavirus infection was 82,6%, noravirus infection – 8,7%, enterovirus infection – 6,9%. In persons under 17 years of age, rotavirus gastrointestinal tract lesions were observed in 74,8%, norovirus disease in 59,9%, and enterovirus intestinal manifestation in 98,6% of children. In general, during the study period, the share of viral intestinal infections in persons under 17 years of age was 75,0% of all confirmed cases among the population. Outbreaks of intestinal infection in the region were analyzed. The average value of outbreak incidence over 7 years was 0,64 ± 0,003 % of all registered cases of acute intestinal infection. Foci of infection were mainly located in preschool institutions, where the source was people, and the route of transmission was contact-household. In all cases, viral intestinal infection was confirmed. The leading cause of foci of intestinal infection was the Norwalk virus (54,1%). An outbreak of isolated rotavirus infection was detected in 35.1%, and in combination with norovirus – 2,7%. Enterovirus was the cause of group morbidity in 8,1% of cases. Norovirus infection foci in 100% of cases were found in preschool institutions.

Conclusion. In the Omsk region, there is a tendency for low verification of diarrheal syndrome in the population, which affects the under-detection of patients or carriers of acute intestinal pathogens. Viral diarrhea prevails among the population, among which people under 17 years of age make up the majority.

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