Analysis of over 20,000 gut microbiomes from 36 countries revealed three universal microbial ecological factors that define the health-disease spectrum. The dysbiotic factor (dominated by Bacteroides uniformis) was consistently elevated across disease populations, while the protective factor (characterized by Prevotella copri) was reduced in diseased individuals compared to healthy controls. A third intermediate factor represented by Bifidobacterium adolescentis reflected mixed ecological states. This represents a significant advance in microbiome research by moving beyond simple diversity metrics to identify specific bacterial signatures that transcend geographic and disease boundaries. The framework's validation across psychiatric disorders, showing associations with clinical symptoms and biomarkers, suggests these factors could serve as universal diagnostic tools. However, the observational nature limits causal interpretations, and the focus on major diseases may not capture subtler health variations. The finding that microbiome variability increases in disease states aligns with ecological theory and supports the concept that healthy microbiomes maintain more stable configurations. This work could revolutionize personalized medicine by providing standardized microbiome biomarkers for disease risk assessment and treatment monitoring across diverse populations.