Dental Caries Microbiology — NDEB AFK MCQ

Instant feedback + full explanation. One question, done properly.

ModerateBiomedical SciencesDental Caries MicrobiologyNDEB AFK

Streptococcus mutans is considered a primary aetiological agent of dental caries because it produces which of the following?

Educational content. Not a substitute for clinical judgement or local policy.

Reveal the answer and explanation

Correct answer: C — Glucosyltransferase

S. mutans produces glucosyltransferase (GTF), which synthesises water-insoluble glucans from sucrose. These glucans enable firm bacterial adhesion to tooth surfaces and contribute to biofilm (plaque) formation. Combined with S. mutans' acidogenic and aciduric properties, this makes it a key cariogenic organism.

Reference: Fejerskov & Kidd – Dental Caries: The Disease and Its Clinical Management, 3rd ed., 2015