Arizona Esthetics State Board Practice Exam

A germicide that can kill bacteria responsible for skin infections is known as:

1. Hydrogen peroxide

2. Lysol

3. UV light

4. Chlorine bleach

The correct answer is: UV light

The correct answer identifies a germicide that can effectively kill bacteria responsible for skin infections. UV light is known for its ability to inactivate a wide range of microorganisms, including bacteria, by disrupting their DNA and preventing them from replicating. This makes UV light a powerful tool in infection control and sanitation. The other options, while having disinfecting properties, serve different purposes or are less effective for direct use on the skin or during cosmetic procedures. Hydrogen peroxide is a common antiseptic but can cause irritation and is typically used in diluted forms for wound cleaning rather than as a general germicidal agent for skin infections. Lysol is primarily designed for surface disinfection and is not safe for application on the skin. Chlorine bleach is a potent disinfectant known for its use in cleaning and sanitation but is too harsh for direct application to the skin due to its corrosive nature. By considering how each choice interacts with bacteria and its appropriate use, the role of UV light as a safe and effective germicide for combating skin infections becomes evident.