Which of the following statements about Bacteroides is NOT true?

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They are sensitive to a wide range of antibioticsThey are primarily found in polymicrobial infectionsBacteroides fragilis is the most frequently encountered speciesThey are anaerobic bacteria that resist bile

Explanation

Bacteroides species are generally resistant to many antibiotics, commonly occur in mixed infections, with Bacteroides fragilis being the most prevalent species. Additionally, they are anaerobic bacteria that can withstand bile. Therefore, the statement that they are sensitive to numerous antibiotics is incorrect.