PROTEOLYTIC ACTIVITY OF MICROFLORA IN ORAL CAVITY OF PATIENTS WITH PERIODONTITIS
Microbial spectrum and non-specific as well as specific IgAl protease activity of isolated microorganisms were investigated in gingival liquid of patients with periodontitis. Microorganisms from the gingival liqud of these patients belonged to conditional-pathogenic obligate and facultatively anaerobic bacteria. 24 strains of microorganisms have been identified Nonspecific proteolytic activity was found in the following microorganisms: <i>Actinomyces israelii, Actinomyces naeslundii, Aerococcus viridans, Bifidobacterium longum, Neisseria subflave, Streptococcus parvulus, Eubacterium alactolyticum, Lactobaccilus catenoforme, Bacillus spp.</i> Specific IgAl-protease activity and lack of proteolytic activity towards IgG was found in <i>Streptococcus acidominimus, Streptococcus hansenii, Streptococcus salivarius, Leptotrychia buccalis, Staphylococcus haemolyticus </i>and <i>Neisseria sicca. </i>No proteolytic activity was found in cultivation medium <i>of Eubacterium alactolyticum </i>(1 strain), <i>Prevotella buccalis, Aerococcus viridans </i>and <i>Streptococcus sanguis</i>