Normal Microbiota May Cause Disease If Conditions Change in the Body

Question

Normal microbiota may cause disease if conditions change in the body.

Accepted Answer

Normal microbiota are usually harmless and can even provide benefits to the body, such as producing vitamin K and preventing colonization by pathogenic organisms. However, if conditions change in the body such as a weakened immune system or disruption of the normal microbiota balance, these normally harmless organisms can become pathogenic and cause disease.