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True or False: Clostridioides difficile cases are usually associated with a prior antibiotic therapy.
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Ch. 19 - Digestive System Infections
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619
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TOC.tableOfContents
- Ch. 2 - Biochemistry Basics19
- Ch. 4 - Introduction to Eukaryotic Cells16
- Ch. 6 - Viruses and Prions12
- Ch. 8 - Microbial Metabolism16
- Ch. 9 - Principles of Infectious Disease and Epidemiology11
- Ch. 10 - Host Microbe Interactions and Pathogenesis19
- Ch. 11 - Innate Immunity24
- Ch. 12 - Adaptive Immunity22
- Ch. 13 - Immune System Disorders15
- Ch. 14 - Biomedical Applications: Vaccines, Diagnostics, Therapeutics, and Molecular Method14
- Ch. 15 - Antimicrobial Drugs18
- Ch. 16 - Respiratory System Infections16
- Ch. 17 - Skin and Eye Infections19
- Ch. 18 - Nervous System Infections12
- Ch. 19 - Digestive System Infections20
- Ch. 20 - Urinary and Reproductive System Infections10
- Ch. 21 - Cardiovascular and Lymphatic Infections15
Norman-McKay2nd EditionMicrobiology: Basic and Clinical PrinciplesISBN: 9780137661619Non è quello che usi tu?Cambia libro di testo
Capitolo 15, Problema 12
Why does dietary sugar increase the risk for developing dental caries?
Guida verificata passo dopo passo1
Understand that dental caries (tooth decay) is caused by the demineralization of tooth enamel due to acids produced by bacteria in the mouth.
Recognize that dietary sugars, especially sucrose, glucose, and fructose, serve as substrates for oral bacteria such as Streptococcus mutans.
Know that these bacteria metabolize sugars through fermentation, producing organic acids like lactic acid as byproducts.
Realize that the acids lower the pH in the dental plaque biofilm, leading to enamel demineralization when the pH drops below a critical threshold (around 5.5).
Conclude that frequent consumption of dietary sugars provides a continuous supply of fermentable substrate, promoting acid production and increasing the risk of dental caries development.
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Role of Oral Microbiota in Dental Caries
Dental caries develop when certain bacteria in the mouth, such as Streptococcus mutans, metabolize sugars and produce acids. These acids demineralize tooth enamel, leading to decay. Understanding the interaction between oral bacteria and dietary sugars is essential to grasp how caries form.
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Normal Microbiota
Fermentation of Dietary Sugars
Oral bacteria ferment dietary sugars like sucrose, glucose, and fructose, producing organic acids as byproducts. This acid production lowers the pH in the dental plaque, creating an acidic environment that promotes enamel demineralization and caries development.
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Demineralization and Remineralization Balance
Tooth enamel undergoes continuous cycles of demineralization and remineralization. Frequent sugar intake shifts this balance toward demineralization by sustaining acidic conditions, which prevents enamel repair and increases the risk of cavities.
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