These microorganisms tend to suppress or displace other acidogenic bacteria due to the low pH and are one of the most acid tolerant of the cariogenic microorganisms.

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Lactobacillus is known for its ability to survive in low pH environments and to produce lactic acid, which can further decrease pH levels. It is considered one of the most acid tolerant of the cariogenic microorganisms and can displace other acidogenic bacteria in the oral cavity. Streptococcus mutans and Streptococcus sobrinus are also cariogenic microorganisms, but they are not as acid tolerant as Lactobacillus. Actinomyces species are not typically associated with caries formation.

These Microorganisms Tend to Suppress or Displace Other Acidogenic Bacteria