Red Seal Cosmetology Practice Exam

What defines pathogenic bacteria?

1. Non-harmful bacteria that can't spread

2. Bacteria found only in soil

3. Harmful bacteria that can spread from person to person

4. Harmful bacteria that are airborne only

The correct answer is: Harmful bacteria that can spread from person to person

Pathogenic bacteria are bacteria that cause disease or harm to the host organism. This means that they are capable of causing illness or infection. Option A is incorrect because it states that pathogenic bacteria are non-harmful, which is not true. Option B is incorrect because it limits the habitat of pathogenic bacteria to just soil, while in reality they can be found in a variety of environments. Option D is incorrect because it restricts the mode of transmission of pathogenic bacteria to only airborne, while they can be spread through other means such as direct contact or contaminated food and water. Option C is the correct answer because it accurately defines pathogenic bacteria as harmful and capable of spreading from person to person.