Veillonella species make up approximately what percentage of bacterial species in oral biofilms?

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Prepare for the Microbiology and Immunology 6400 Oral Intermicrobial Interactions Test. Study with engaging materials, flashcards, and multiple-choice questions. Each question offers hints and detailed explanations. Ace your exam today!

Multiple Choice

Veillonella species make up approximately what percentage of bacterial species in oral biofilms?

Explanation:
Veillonella are a relatively common part of the bacterial community in oral biofilms, contributing about ten percent of the species present. They’re anaerobic cocci that often appear alongside streptococci; the streptococci produce lactate, which Veillonella utilize as a carbon source. This cross-feeding helps maintain balance and diversity within the biofilm, so Veillonella’s presence as roughly one-tenth of the species aligns with how frequently they’re detected across individuals and sites. The other percentages would over- or under-represent their typical presence in oral biofilms.

Veillonella are a relatively common part of the bacterial community in oral biofilms, contributing about ten percent of the species present. They’re anaerobic cocci that often appear alongside streptococci; the streptococci produce lactate, which Veillonella utilize as a carbon source. This cross-feeding helps maintain balance and diversity within the biofilm, so Veillonella’s presence as roughly one-tenth of the species aligns with how frequently they’re detected across individuals and sites. The other percentages would over- or under-represent their typical presence in oral biofilms.

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