Which of the following refers to an infection that does not cause disease?

The term that refers to an infection that does not cause disease is non-pathogenic infection. Such infections can occur when microorganisms are present in the body but do not lead to any illness or harmful effects. Non-pathogenic organisms are typically part of the normal flora found in various parts of the body, such as the skin and gut, and they can even provide beneficial functions, such as aiding in digestion or preventing the colonization of harmful pathogens.

In contrast, pathogenic infections involve microorganisms that are capable of causing disease, while invasive infections indicate that an infection has penetrated deeper into body tissues, which often leads to disease. Opportunistic infections, on the other hand, occur when the immune system is compromised, allowing normally non-pathogenic organisms to cause disease. Thus, the distinction made by non-pathogenic infections emphasizes the absence of disease despite the presence of microorganisms.