THE PREVALENCE OF CAGA HELICOBACTER PYLORI AND CHARACTERISTICS OF AN ASSOCIATED GASTRITIS IN SCHOOLCHILDREN IN THE REPUBLIC OF TYVA

Abstract

Aim of the research. To study the prevalence of H. pylori cytotoxin-associated gene A (CagA) strain and estimate the activity of associated gastritis in schoolchildren with dyspepsia syndrome in the Republic of Tyva. Materials and Methods. We studied the prevalence of H. pylоri CagA strain by performing the cross-sectional examination for picked up randomly 1064 schoolchildren aged of from 7 to 17 years, residing in the Republic of Tyva. We used the technique of determination of blood IgG to CagA antigen of H. pylori in 218 children, including 131 cases with dyspeptic complaints. We also executed esophagogastroduodenoscopy including biopsy sampling. Results. CagA-seropositive children accounted for 47.2%. We noted the increase in the activity of antral gastritis in H. pylori-infected schoolchildren with the maximum being related to CagA-seropositive schoolchildren. Gastritis activity in the body of stomach in H. pylori-infected children was higher as compared to non-infected children, but as a whole it was lower than in antral region of the stomach. Besides that we revealed specific features of gastritis activities in the body and in the antral region of stomach in children in ethnic populations. The peculiarities are referred to the presence of the differences between the mentioned parameters in alien schoolchildren and the absence of such differences in the Tyvan schoolchildren. Conclusion. Widely spread H. pylori, in particular CagA strain of the microorganism, plays the adverse role in the development and especially progressing of gastritis in schoolchildren residing in the Republic of Tyva. The importance of the adverse impact of the infection is associated with the ethnicity of children.