A recent study published in Scientific Reports suggests a link between the oral bacterium Fusobacterium nucleatum and increased disability in multiple sclerosis (MS) patients. Researchers found that a high abundance of this bacterium was associated with significantly higher odds of severe disability among MS patients, potentially acting as a 'bridge bacterium' in chronic inflammation. This research highlights the importance of exploring the oral microbiome's role in MS, offering potential avenues for new preventive strategies.