title: [Studies of oral microbiocenosis. I. Incidence and properties of staphylocci in young persons].
abstract: The study of staphylococci in the buccodental washings of 117 second year students at the Faculty of Stomatology, all healthy youths aged 20-25 years, gave the following results: (I) stapphylococci were present in 90% of the students; (II) 50.66% were oral carriers of pathogenic staphylococcal strains; (III) in 23 cases two or more staphylococcal strains were found with different metabolic and biologic properties; (IV) part of the bucal lysozyme was of microbial origin since 95% of the coagulasopositive strains and 88% of the coagulasonegative strains produce lysozymes; (V) 35.23% of the strains yield staphylococcal active with regard to M. lysodeicticus; (VI) 56.19% of the staphylococcal strains were resistant to penicillin and/or tetracyclin, and 5 coagulopositive strains developed in media with a penicillin concentration of 800 u/ml; (VII) 85% of the coagulopositive staphylococci were sensitive to human anti-staphylococcal bacteriophages, the most frequent being phage type 77 of group III.
mesh_terms: D000328:Adult; D000367:Age Factors; D000900:Anti-Bacterial Agents / Q000494:pharmacology; D001430:Bacteriocins / Q000032:analysis; D001434:Bacteriophage Typing; D005260:Female; D006801:Humans; D008297:Male; D008826:Microbial Sensitivity Tests; D009055:Mouth / Q000382:microbiology*; D012463:Saliva / Q000382:microbiology*; D013210:Staphylococcus / Q000187:drug effects / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents; D001430:Bacteriocins
vernacular_title: Studii de microbiocenoză orală. I. Frecvenţa şi proprietăţile stafilococilor la tineri