Enterobacteria in the intestinal microbiocenosis of hivinfected children

Abstract

Aim. The purpose was to assess the species composition, virulence factors and the nature of the interaction of Enterobacteria with intestinal microsymbionts in HIV-positive children.Material and methods. The composition of intestinal microbiocenosis of 89 HIV-infected children (main group) and 74 children without HIV status (comparison group) was studied. 273 strains of Enterobacteria were isolated and identified to the species. The frequency and level of expression of adhesion, invasion, toxin formation and antagonism factors were studied.Results. In HIV-positive children colonization rate of intestinal mucosa E. coli lac — was 5 times higher, E. coli hly+ 1.5 times higher than in the comparison group. The quantitative level of opportunistic enterobacteria increases with the aggravation of microecological disorders, 98% of enterobacteria forms a many-to-many association. Of these, 86.8% are neutral towards other symbionts. The frequency and level of production of adhesion, invasion and toxin formation factors did not differ in the compared groups.Conclusion. In HIV-infected children is formed enterobacteriales type microbiota. Biological properties of enterobacteria did not depend on the presence of HIV status in children.

Keywords

• enterobacteria
• hiv infection
• microbiocenosis
• properties
• associations