PSI Barbering Practice Exam

Which type of bacteria can cause diseases or infections in humans?

1. Pathogenic bacteria

2. Non-pathogenic bacteria

3. Probiotic bacteria

4. Aerobic bacteria

The correct answer is: Pathogenic bacteria

Pathogenic bacteria are specifically known for their ability to cause diseases or infections in humans and other living organisms. These bacteria have evolved mechanisms that enable them to invade host tissues, evade the immune system, and produce toxins that can lead to various health issues. Understanding the role of pathogenic bacteria is essential in fields such as medicine and public health, as it helps in developing treatments and preventive measures against bacterial infections. Non-pathogenic bacteria, on the other hand, typically do not cause disease and can even be beneficial, playing crucial roles in processes such as digestion and maintaining a healthy microbiome. Probiotic bacteria are a subset of non-pathogenic bacteria that are consumed to improve gut health and boost the immune system. Aerobic bacteria require oxygen for growth but can be either pathogenic or non-pathogenic. Thus, while the other types of bacteria play important roles in health and disease, it is the pathogenic bacteria that are directly associated with causing illness.