Michigan Esthetician State Board Practice Exam

Which of the following is NOT a category of potentially infectious microorganisms?

1. Bacteria

2. Viruses

3. Fungi

4. Allergens

The correct answer is: Allergens

Allergens are substances that can cause allergic reactions in individuals, but they are not classified as infectious microorganisms. Infectious microorganisms include bacteria, viruses, and fungi, all of which can invade living organisms, multiply, and potentially cause diseases. Bacteria are single-celled organisms that can exist in various environments and can be pathogenic, meaning they can provoke infection. Viruses are even smaller than bacteria and require a host cell to replicate; they can also lead to a range of illnesses. Fungi encompass a variety of organisms, including yeasts and molds, some of which can cause infections, particularly in immunocompromised individuals. In contrast, allergens are typically proteins or substances that trigger immune responses and do not have the ability to reproduce or cause infectious diseases in the same way that bacteria, viruses, and fungi do. Therefore, allergens are not considered a category of potentially infectious microorganisms. Understanding these distinctions is crucial for estheticians, as it informs best practices for hygiene and safety in the treatment environment.