Notice how a resident’s role depends on the organism and its setting.
Read the summary and role tags. What makes this a resident profile?
A gut resident with roles in breaking down carbohydrates.
Compare the resident and illness tags. Which statement is scoped to some strains?
Many strains are harmless residents. Some cause diarrheal illness.
Read the body-site context. How does this profile differ from the two gut profiles?
A lactic-acid-producing resident that dominates one of the most common and most acidic vaginal community types.
Which profile says many kinds are harmless residents while some cause illness?
Option: Bifidobacterium longum
Answer: Escherichia coli
Option: Lactobacillus crispatus
CDC describes most E. coli as harmless members of the intestinal tract, while some kinds cause illness.
Which profile is linked to a vaginal community type in the cited study?
Option: Escherichia coli
Answer: Lactobacillus crispatus
Option: Bifidobacterium longum
The Ravel study describes a vaginal community type dominated by L. crispatus. It does not predict an individual health outcome.