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: Dental
Which of the following  bacteria do not invade host tissue cell? 
Select and explain. 
A. T. denticola, B. P. intermedia, C. P. gingivalis, D. F. nucleatum
B: P. intermedia
Answer: B: P. intermedia 
Explanation: None