This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Microbiology
Which of the following statement about Bacteroides is TRUE? 
Select and explain. 
A. It is strictly aerobic, B. It can cause peritonitis, C. It is a gram positive bacilli, D. Presence in stool culture indicates need for treatment
B: It can cause peritonitis
Answer: B: It can cause peritonitis 
Explanation: Bacteroides are commonly responsible for abdominal infections such as subphrenic abscess, hepatic abscess, peritonitis, appendicitis and brain abscess. Ref: Sherris Medical Microbiology By Kenneth J. Ryan, 5th Edition, Chapter 29