Microbiology: A Systems Approach 4th Edition by Marjorie Kelly Cowan

Exercise 50

Critical thinking is the ability to reason and solve problems using facts and concepts. These questions can be approached from a number of angles and, in most cases, they do not have a single correct answer.
a. Summarize the current knowledge of normal biota in the human mouth. To what domain of life do most of these microorganisms belong
b. Explain why many patients undergoing dental surgery are placed on antibiotic therapy before the procedure.