Which type of microorganisms are known to be beneficial to the body?

Nonpathogens are microorganisms that do not cause disease and can be beneficial to the body. These include various types of bacteria that inhabit the human body, particularly in areas such as the gut, skin, and respiratory tract. For example, beneficial bacteria in the gut play a critical role in digestion, production of certain vitamins, and protection against harmful microorganisms. They help maintain a balanced microbiome, which is essential for overall health.

In contrast, pathogens are microorganisms that can cause disease, viruses can be harmful agents that invade cells and replicate, while parasites rely on a host for sustenance and often lead to illness. Nonpathogens contribute positively to bodily functions and overall health, making them essential for maintaining a healthy microbiome.