“What are the 10 Most Common Bacteria in the Oral Cavity, of the Normal Flora?”

12.29.23 Quick Review #88 - #pathology #oralpathology #doctorgallagher #oralsurgery #oralsurgeon #dentist #dentistry #dental #microbiology #microbiome The human oral cavity hosts a diverse community of microorganisms, including bacteria, which play a crucial role in oral health and disease. The most common bacteria that are typically part of the normal oral flora include: 1. **Streptococcus mutans:** Best known for its role in tooth decay, it metabolizes sugars to produce acid that erodes tooth enamel. 2. **Streptococcus salivarius:** Commonly found on the tongue and in saliva, it plays a role in protecting against pathogenic bacteria. 3. **Streptococcus sanguinis:** This species is involved in the early stages of plaque formation on teeth. 4. **Porphyromonas gingivalis:** Often associated with periodontitis, a severe gum disease, but it can be found in low levels in healthy mouths. 5. **Actinomyces naeslundii:** Plays a role in the formation of dental plaque and can be involved in tooth decay and gum disease. 6. **Veillonella:** A genus of bacteria that metabolizes products of other oral bacteria, and is commonly found in dental plaque. 7. **Fusobacterium:** This genus is found in plaque and is associated with periodontal diseases. 8. **Prevotella:** Involved in periodontal diseases and can also be found in healthy oral environments. 9. **Neisseria:** A genus that includes species which are typically harmless inhabitants of the oral cavity. 10. **Lactobacillus:** While better known for its role in the gut, certain species are found in the mouth and can contribute to tooth decay in high numbers. It's important to note that the presence of these bacteria in the mouth is normal and not inherently harmful. They become problematic primarily when the balance of the oral microbiome is disturbed, often due to poor oral hygiene, dietary habits, or other health conditions. This imbalance can lead to dental issues such as cavities, gum disease, and bad breath. Maintaining good oral hygiene and regular dental check-ups are key to managing the levels of these bacteria and ensuring oral health. References: 1. Reynolds-Campbell, G., Nicholson, A., & Thoms-Rodriguez, C. A. (2017). Oral Bacterial Infections: Diagnosis and Management. Dental Clinics of North America, 61(2), 305-318. https://lnkd.in/eBSHJBEx 2. Wade, W. G. (2013). The oral microbiome in health and disease. Pharmacological Research, 69(1), 137-143. https://lnkd.in/evt9DPdD 3. Paster, B. J., Boches, S. K., Galvin, J. L., Ericson, R. E., Lau, C. N., Levanos, V. A., Sahasrabudhe, A., & Dewhirst, F. E. (2001). Bacterial diversity in human subgingival plaque. Journal of Bacteriology, 183(12), 3770-3783. https://lnkd.in/ekUDQtYx 4. ChatGPT. 2023.