Johannes Fibiger

Johannes Fibiger, born on April 23, 1867, was a distinguished Danish physician and professor of anatomical pathology at the University of Copenhagen. His groundbreaking work in the early twentieth century led to the discovery of a roundworm he named Spiroptera carcinoma, which he believed was responsible for inducing stomach cancer in rats and mice. This assertion was later proven to be a misinterpretation of his findings.

In 1907, while conducting research at the Institute of Pathological Anatomy, Fibiger identified new roundworms from wild rats and hypothesized their link to cancer. By 1913, he claimed to have successfully induced cancer in healthy rats through these roundworms, a discovery that was hailed as a monumental contribution to experimental medicine at the time.

Fibiger's work earned him the Nobel Prize in Physiology or Medicine in 1926, although he was initially nominated alongside Katsusaburo Yamagiwa, who had conducted significant cancer research. The prize was not awarded that year, but Fibiger was retrospectively recognized the following year. However, subsequent research revealed that the tumors attributed to G. neoplasticum were actually due to vitamin A deficiency, and Fibiger had mistakenly identified non-cancerous tumors as cancerous.

In 2010, Erling Norrby, a prominent figure in the field of virology, described Fibiger's Nobel Prize as one of the most significant errors made by the Karolinska Institute. Despite the controversies surrounding his findings, Fibiger's research methodology on diphtheria is acknowledged as a foundational aspect of controlled clinical trials in medicine.