What role do microbiota play in human health and disease?

Study for the Cengage Microbiology Test with helpful multiple choice questions and detailed explanations. Ace your exam with confidence!

Microbiota are essential partners in human health. They aid digestion by breaking down complex carbohydrates and fiber that our own enzymes can’t process, and they produce metabolites and vitamins, such as certain B vitamins and vitamin K, that our bodies use. They also help educate and shape the immune system, guiding development of gut-associated immune tissues and helping regulate inflammatory responses to keep the system balanced. When the microbial community becomes imbalanced, known as dysbiosis, these protective functions falter, and such imbalances are linked to a range of diseases and greater susceptibility to infections because the barrier function and competitive exclusion of pathogens are weakened. This shows why microbiota play a constructive, integrated role in health rather than being merely linked to disease or environmental in nature.