What do we call bacteria that do not cause disease and are generally harmless?

The term for bacteria that do not cause disease and are generally harmless is "non-pathogenic." These bacteria are part of the normal flora of the body and play important roles in processes such as digestion and protecting against harmful microorganisms. They are vital for maintaining a healthy balance in both human and environmental ecosystems.

Understanding the distinction between non-pathogenic bacteria and pathogenic bacteria is crucial for estheticians and others in the beauty and health fields. Non-pathogenic bacteria can support skin health, whereas pathogenic bacteria can lead to infections and other health issues. This knowledge helps professionals provide better care and maintain hygiene standards.

The other terms listed refer to different concepts in microbiology. "Pathogenic" bacteria are those that can cause diseases, while "virulent" refers to the degree of pathogenicity, meaning how severe the disease-producing capability of a pathogen can be. "Innocuous" typically means harmless but does not specifically refer to bacteria exclusively. Therefore, "non-pathogenic" is the most precise term for describing bacteria that are harmless and do not cause disease.