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[Microflora in a controlled caries model study in rats].

L Stösser1, S Kneist, C Becher

  • 1Wissenschaftsbereich Präventive Stomatologie, Medizinischen Akademie Erfurt, DDR.

Die Nahrung
|January 1, 1987
PubMed
Summary
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Antibiotic treatment can eliminate competing bacteria, enabling successful colonization by Streptococcus mutans (Str. mutans) in rats. This high-cariogenic pathogen leads to increased dental caries, even in mono-associated models.

Area of Science:

  • Microbiology
  • Animal models
  • Dental research

Context:

  • Investigating dental plaque formation and caries development.
  • Utilizing Osborne-Mendel rats and a sucrose-rich diet.
  • Examining the impact of antibiotics on oral flora composition.

Purpose:

  • Determine optimal conditions for animal colonization with Streptococcus mutans (OMZ 176).
  • Assess the influence of a cariogenic diet and antibiotic intervention on oral microbiota.
  • Evaluate the cariogenicity of Str. mutans in a controlled animal model.

Summary:

  • A sucrose diet modified rat oral flora towards streptococcal dominance without altering total germ numbers.
  • An erythromycin/penicillin combination drastically reduced germ counts and eliminated competing streptococci.

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  • This allowed for successful microbiological association with Str. mutans OMZ 176.
  • Mono-associated gnotobiotic Wistar rats exhibited higher caries scores compared to conventional rats, confirming Str. mutans OMZ 176 as highly cariogenic.

    • Impact:

    • Establishes a method for achieving controlled Str. mutans colonization in animal models.
    • Provides evidence for the high cariogenic potential of Str. mutans.
    • Informs strategies for studying dental caries pathogenesis and prevention.