How many primary types of bacteria fall into the classification stated?

In microbiology, bacteria are classified into two primary types: pathogenic and non-pathogenic. Pathogenic bacteria are those that can cause diseases in humans and animals, while non-pathogenic bacteria are generally harmless and may even be beneficial, serving roles such as aiding in digestion or contributing to the natural flora of the skin and environment. This classification helps in understanding how different types of bacteria interact with hosts, their roles in health and disease, and the importance of hygiene practices in settings like nail salons where the presence of bacteria can impact clients' health. Knowing that there are these two primary classifications allows nail technicians to better appreciate the importance of sanitation and the potential risks associated with bacteria.