ABSTRACT
The article deals with results of studying diphtheria causative agent capacities to form biofilm as one of mechanisms of persistence in human organism. The study object was strain of C.diphtheriae gravis tox+ obtained from nasopharynx of patient aged 19 in municipal hospital No 1 of town of Gukovo of Rostov oblast in 2011. The patient had diagnosis of "diphtheria of nasopharynx, typical filmy, localized, mild severity, even course". The control was implemented using the museum strain C.diphtheriae gravis tox+ No 665 from the L.A. Tarasevitch state research institute of standardization and biologic preparations control. It is established that diphtheria causative agent as an ability to form biofilm. The intensity of process of formation of exopolysaccharide is higher on glass that on plastic surfaces. The differences in degree of intensity of formation of biofilm are revealed between the strain circulation in population and museum strains C.diphtheriae gravis tox+. The vital capacity of biofilm forming microorganisms is related with adaptation possibilities of strains.
