EPIDEMIOLOGICAL CHARACTERISTICS OF VIRAL HEPATITIDES A, B, AND С IN A LARGE INDUSTRIAL CITY OF WESTERN SIBERIA

Objective. To study morbidity rates and age structure in patients with hepatitides A (НА), В (HB), and С (HS) among the population of a large industrial city in Western Siberia. Material and methods. The data of Reporting Form 2 «Information on Infectious and Parasitic Diseases» from the Branch of the Center of Hygiene and Epidemiology in the Kemerovo Region in Novokuznetsk over 2001-2014 were analyzed. Results. In the pattern of acute hepatitides, there was a preponderance of HA, the higher incidence of which was noted in 2005-2008. Adult patients accounted for 60-73%. The maximum number of newly detected cases of chronic hepatitiess was established in 2006; the incidence rate was 79.1%oooo; the proportion of adult patients was more than 98%. The pattern of chronic hepatitides was dominated by HC; the incidence rate ranged from 65.43 to 23.54%ooo and in 2014 reached the average Russian rate. The incidence of chronic HB(11.56-2.85%ooo) remained below the average Russian rate (15.5-11.6%ooo). However, the total proportion of newly detected chronic hepatitis В and HBV carriage (28.5-43.3%ooo) was 37 34-66.67%. Conclusion. In the etiological pattern of acute hepatitides, there was a preponderance of HA and an increase in the proportion of adults among the patients. The incidence of chronic hepatitides was consistently high, mainly due to adult patients. The carriage rate for HBV in conjunction with HCV was higher than that for HCV.

prevalence, morbidity, age structure of patients