[Biological properties of opportunistic microorganisms--agents of acute intestinal infections].

The etiological role of conditionally pathogenic bacteria in acute intestinal infections in the Sumy region has been studied. It is established, that the strains of Klebsiella pneumoniae, Staphylococcus aureus and Enterobacter cloacae isolated from patients with acute intestinal infection were characterized by phenotypic heterogeneity. In 85.0 +/- 5.6% of the studied strains of K. pneumoniae, 30.0 +/- 7.2% of E. cloacae, 20.0 +/- 5.6% S. Aureus the authors have identified pathogenicity factors, which ensure their ability to adhesion and persistence (antiinterferon and anticomplement activity).