When was fecal microbiota transplantation first reported as a medical treatment?

In 1958, physicians published one of the first modern reports of fecal microbiota transplantation, now often called FMT. The treatment involved transferring stool from a healthy donor to restore beneficial gut microbes in a sick patient. It later became especially important for recurrent Clostridioides difficile infection, one of the clearest examples of microbiome-based therapy. Although the idea was old in some veterinary and historical contexts, the 1958 report marked an important modern medical milestone.