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[Pathogenicity factors of opportunistic enterobacteria and its role in development of diarrhea].

The data of pathogenicity factors of opportunistic enterobacteria, including Klebsiella, Enterobacter, Citrobacter, Proteus, Providencia and Hafnia species are submitted. The genetic control and a role of pathogenicity factors of opportunistic enterobacteria in development of diarrhea syndrome are presented. Data about adhesins, hemolysins, cytotoxic necrotizing factors and bacterial modulins are described. The characteristic of cytotonic and cytotoxic enterotoxins, including LT, ST, Shiga-like and cytolethal toxins, and mechanisms of diarrheagenic action are analysed. The role of bacterial lipopolysaccharide (endotoxin) and induction of locally synthesized proinflammatory cytokins in pathogenisis of diarrhea are discussed.