Arkansas Esthetician Practice Exam 2026 - Free Esthetician Practice Questions and Study Guide

Non-pathogenic bacteria are bacteria that do not cause disease in humans or other animals. Option A is incorrect because disease-producing bacteria are known as pathogenic bacteria. Option B is incorrect because non-pathogenic bacteria can also live in moderate conditions. Option D is incorrect because not all bacteria found in vaccines are non-pathogenic. Therefore, the only correct choice is C - nondisease-producing bacteria.