Numerous environmental factors have been implicated in the development of autoimmune disease, including antibiotic use, birth by cesarean section, chemical exposure, poor diet, and sleep deprivation, among others (1, 2, 3, 4, 5). While it is widely believed that disease onset requires an environmental trigger, most autoimmune conditions have a genetic component as well (6).
Genetic information can be a powerful tool in aiding both diagnosis and treatment. One particular group of genes that has been strongly associated with various autoimmune diseases is HLA-B27. In this article, I'll discuss HLA-B27, the role of a gut microbe called Klebsiella, and why a low-starch diet may be effective for those who have an HLA-B27-associated autoimmune disease.