Streptococcus mutansの平滑面付着におよぼすクロラムフェニコールリファンピシンおよびクロルヘキシジンの影響

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This study was undertaken to clarify the effect of chloramphenicol (CP), rifampicin (RFP) and chlorhexidine (CH) on the adherence of Str. mutans to smooth surfaces and ultrastructural changes of insoluble glucans (IG). The results obtained were as follows: 1) The structures of IG in TSB with 5% sucrose (control) could be observed. (a) Amorphous structures on the smooth surfaces, which was accompanied with protrusions. (b) Band-like structures consisted of 40〜120nm in width, which connected cells to cells, and cells to massive structures. (c) Massive structures which connected band-like structures. 2) Microcolonies, which were composed of structures mentioned above and cells, appeared as the cumulonimbus-like structures of strata. Among microcolonies, band-like structures developed into net-like structures. 3) Treated with MIC and 2 MIC, which indicated remarkable values of inhibition, there were considerable amounts of deposits under SEM observation. In comparison with control, they gave rise to decreased band-like structures and decreased massive structures accompanied with remarkable constrictions. 4) In the treatment with 1/2MIC (MAC), the amounts of synthesized IG differed between drugs. In case of CP in 1/2 MIC, bacterial cells indicated a normal growth. Inhibitory effects of synthesizing IG could not be recognized at all, however there could be observed less developed band-like structures and their bulb formations at the ends. It is reasonable to presume that such phenomena indicated qualitative differences. 5) In system synthesizing IG from crude GTase, there was no inhibition of synthesizing IG in CP and RFP, but a 40.6% inhibition in CH including 1,000 MIC. These results suggest that in case of CP or RFP, the inhibition of IG synthesis in cell growing system was due to the inhibition of synthesizing GTase closely associated with the inhibition of cell growth, but in CH it was due to not only the thing mentioned above but also the inhibition of GTase activities. 6) It appeared obvious that the band-like structures protruded from cells were responsible for adherence of Sir. mutans to smooth surfaces.
特定非営利活動法人日本歯周病学会の論文
1981-06-28

Streptococcus mutansの平滑面付着におよぼすクロラムフェニコールリファンピシンおよびクロルヘキシジンの影響

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Streptococcus mutansの平滑面付着におよぼすクロラムフェニコール リファンピシンおよびクロルヘキシジンの影響

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Streptococcus mutansの平滑面付着におよぼすクロラムフェニコールリファンピシンおよびクロルヘキシジンの影響