Description
Oxalobacter formigenes is a Gram-negative bacterium that colonizes the large intestines of numerous vertebrates, including humans. O. formigenes and humans share a beneficial symbiosis. This organism has also been isolated from the gut of ruminant and other non-ruminant herbivores. The absence of O. formigenes is thought to be a cause of hyperoxaluria and the formation of calcium oxalate stones in the kidney.