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How the Body Builds a Healthy Relationship with “Good” Gut Bacteria
Our body’s relationship with bacteria is complex. While infectious bacteria can cause illness, our gut is also teaming with “good” bacteria that aids nutrition and helps keep us healthy. But even the “good” can have bad effects if these bacteria end up in tissues and organs where they’re not supposed to be.
Now, research published in
Nature reveals insights into how the body maintains this balance. Investigations with mice demonstrate that early life is a critical time when the immune system learns to recognize gut bacteria and sets up surveillance that keeps them in check. Defects in these mechanisms could help explain why the immune system sometimes attacks good bacteria in the wrong place, causing the chronic inflammation that’s responsible for inflammatory bowel disease, the study’s authors say.