Streptococcus mutans is regarded as the primary cariogenic pathogen because it generates organic acids and further________________?
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Answer: A. Forms a gelatinous matrix
Explanation
Streptococcus mutans synthesizes sticky extracellular polysaccharides that form a gelatinous dental plaque matrix. This viscous matrix anchors the bacterial biofilm firmly to smooth enamel surfaces in the oral cavity. Production of this gelatinous layer protects the embedded bacteria from salivary washing and antimicrobial agents. Dental plaque is a complex microbial biofilm adhering to mineralized tooth structures in the mouth. Dietary sucrose serves as the primary substrate for bacterial glucosyltransferase enzymes producing extracellular polymers. Organic acids produced by bacterial fermentation demineralize tooth enamel to initiate dental caries.
Preventive dentistry emphasizes mechanical plaque removal through regular brushing to disrupt this bacterial matrix. Dietary counseling limits sucrose intake to reduce the raw materials available for extracellular matrix production. Understanding biofilm formation helps researchers develop advanced therapeutic agents against dental caries. Metabolizing salivary substrates occurs continuously, but the matrix formation specifically relies on dietary sucrose polymers. Deriving energy from enamel constituents is incorrect because bacteria metabolize dietary carbohydrates rather than enamel. Living symbiotically with lactobacillus is a secondary ecological interaction rather than the primary cariogenic mechanism.
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