A. Streptococcus pyogenes.
B. Streptococcus mutans.
D. H. influenzae.
Ans:B. Streptococcus mutans.
The patient in the question is suffering from dental caries.
- Also known as dental caries, cavities, or caries, is a breakdown of teeth due to activities of bacteria.
- The cause of caries is bacterial breakdown of the hard tissues of the teeth (enamel, dentin and cementum).
- This occurs due to acid made from food debris or sugar on the tooth surface. Simple sugars in food are these bacteria’s primary energy source.
- Since diabetics have a higher concentration of sugar in their saliva, they are more susceptible to tooth decay.
- Risk factors include conditions that result in less saliva such as: Sjogren’s syndrome and some medications that decrease saliva production like antihistamines and antidepressants.
- The most common bacteria associated with dental cavities are the mutans streptococci, most prominently Streptococcus mutans and Streptococcus sobrinus, and lactobacilli.