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悉生大鼠牙齿表面早期定植过程中粘性放线菌和变形链球菌的生长速率。

Growth rates of Actinomyces viscosus and Streptococcus mutans during early colonization of tooth surfaces in gnotobiotic rats.

作者信息

Beckers H J, van der Hoeven J S

出版信息

Infect Immun. 1982 Feb;35(2):583-7. doi: 10.1128/iai.35.2.583-587.1982.

Abstract

Germfree Osborne-Mendel rats were monoassociated with Actinomyces viscosus or Streptococcus mutans. The adherence and subsequent growth of these organisms on the tooth surface was studied by means of total viable cell counts. Both A. viscosus and S. mutans showed a lag phase and an exponential growth phase, similar to logarithmic growth in batch cultures. The exponential growth rates of S. mutans and A. viscosus were 0.63 h-1 (doubling time [td] = 1.1 h) and 0.24 h-1 (td = 2.9 h), respectively. After a period of rapid growth, the rate declined and the populations approached a steady state. The presence of a sucrose-containing diet did not significantly influence the exponential growth rates of A. viscosus and S. mutans, but had a slight negative effect on the initial adherence of S. mutans at the tooth surface.

摘要

无菌的奥斯本-孟德尔大鼠与粘性放线菌或变形链球菌进行单菌定植。通过总活菌计数研究了这些微生物在牙齿表面的黏附及随后的生长情况。粘性放线菌和变形链球菌均呈现出延迟期和指数生长期,类似于分批培养中的对数生长。变形链球菌和粘性放线菌的指数生长速率分别为0.63 h⁻¹(倍增时间[td]=1.1 h)和0.24 h⁻¹(td = 2.9 h)。经过一段快速生长后,生长速率下降,菌量接近稳定状态。含蔗糖饮食的存在对粘性放线菌和变形链球菌的指数生长速率没有显著影响,但对变形链球菌在牙齿表面的初始黏附有轻微的负面影响。

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