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How Crowded Is Your Mouth?

Can you get all 3 questions right? Test your knowledge!

By Kristen Pratt Machado On Dec 4, 2025

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How many bacterial species are contained in the oral microbiome?

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Less than 100

More than 500

More than 700

More than 1,000

Correct! Wrong!

What proportion of oral bacteria can’t yet be grown in culture?

Gorkem Yorulmaz / E+

1% to 2%

17% to 33%

30% to 40%

More than 50%

Correct! Wrong!

Which bacteria are most strongly associated with periodontal diseases?

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Porphyromonas gingivalis

Streptococcus mutans

Streptococcus sobrinus

Lactobacilli

Correct! Wrong!

How Crowded Is Your Mouth?

Well done, 100% correct! You really know your stuff!

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