It’s back to school time, and that means it’s time for parents to become extra cautious about food allergies. Food allergies have gone through the roof in recent years, and scientists are trying to find the root cause of the surge. A new study has identified a gut microbe that stops food allergies in rodents. “The research fits neatly into an emerging paradigm that helps explain a recent alarming increase in food allergies and other conditions, such as obesity and autoimmune disease.”