구강 세균군의 위생학적 연구 : Bacterial Flora of Oral Cavity and Their Characteristics 구강내 세균군과 이들의 특성 = Hygienic Study of Bacterial Flora of Oral Cavity

다국어 초록 (Multilingual Abstract)

69 strains were isolated from swab samples an teeth, gums, tongues of the outpatients of Hongmyeungdo Dental Clinics in Jeju city. All isolates are Gram positive and among them, 64 isolates are rods while 5 strains were cocci. To screen the strains which might be possessed different characteristics from others, 7 different tests, of which tests were included spore formation, oxidase and catalase producing abilities, motility and hydrolysis abilities of protein, lipid and starch, were carried out. Parenthesis indicates test and positive reactions numbers of isolates in each tests(spore formation 5, oxidase and catalase 63, motility l, protein hydrolysis 46, lipid hydrolysis 36 and starch hydrolysis 39). According to screening test results we finally selected 14 strains which were exhibited with different characteristics, and their growth properties were pursued. The best growth of all most strains were appeared in pH 7.0 and at 37'C. Up to 7% of sodium chloride solution all strains were grown, and these selected strains were relatively more sensitive to tetracycline than other antibiotics used in out tests. Generally these strains were also exhibited strong resistance to all metal ions tested. Especially to Pb ion all strains were able to grow in the media containing even 500ppm of it.