PSI Texas State Board Nail Tech practice exam

Which type of bacteria is considered harmless and beneficial to the body?

1. Pathogenic

2. Virulent

3. Nonpathogenic

4. Probiotic

The correct answer is: Nonpathogenic

Nonpathogenic bacteria are classified as those that do not cause disease and are often found within the human body, contributing positively to various bodily functions. These bacteria play crucial roles in processes such as digestion and the maintenance of a healthy immune system. For instance, certain nonpathogenic bacteria are instrumental in breaking down food substances, assisting in nutrient absorption, and even preventing the growth of harmful microorganisms by competing for resources. While probiotics, which are also beneficial, specifically refer to live microorganisms that provide health benefits to the host when consumed in adequate amounts, the broader category of nonpathogenic includes a variety of bacteria that may not necessarily be ingested as supplements but still serve essential functions in overall health. Pathogenic bacteria, on the other hand, are those that can cause disease, and virulent strains are characterized by their ability to cause severe illness. Thus, nonpathogenic bacteria stand out as the group that enhances health and supports the body's systems effectively.