All of the following lab tests can be used to distinguish streptococcus mutans from other oral streptococci, except______________?
Correct answer: A. Gram staining
- A. Gram staining
- B. Fermentation of mannitol and sorbital
- C. Production of intracellular and extracellular adherent polysacharide
- D. Colony morphology on saliva agar
Explanation
Gram staining cannot distinguish Streptococcus mutans from other oral streptococci because all are Gram-positive cocci. Mannitol and sorbitol fermentation, adherent polysaccharide production, and colony appearance are more useful differentiating features.
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