The Dependence of Microorganisms Biofilm Formation on the Features of the Infectious Process

Abstract

Objectives. To study the dependence of the formation intensity of microbial biofilms by isolates from patients on the severity and localization of the infectious process. Material and methods. The study conducted from 2016 to 2020 included 894 clinical isolates from 720 patients with infectious pathology of various localization and severety. The formation intensity of microbial biofilms by isolates received from these patients has been studied, depending on the severity and localization of the infectious process. Results. The property to form biofilms was found out in the overwhelming majority of tested isolates (86.6%). At the same time P. aeruginosa isolates had the maximum biofilm-forming ability, the weight of the microbial biofilm of which was 48.25; 30.1-70.2 mcg/well. The conducted studies have shown the dependence of biofilm formation on the severity of the disease in which isolates were isolated. A direct close relationship was found between the severity of the disease and the mass of microbial biofilm of P. aeruginosа and K. pneumoniae, a weak one - in Acinetobacter spp. (r=0.73, r=0.7 and r=0.35, p<0.05 accordingly). Conclusions. It can be assumed that intensive formation of biofilms by clinical isolates is an important factor of the aggressiveness and severity of the infectious process. Moreover, the conducted study has shown the dependence of biofilm formation on the severity of the disease in which isolates were isolated.