Karl Friedrich Meyer (May 19, 1884 - April 27, 1974), was a Swedish born American pathologist. His career was dedicated to work on infectious disease, he worked on Brucellae and the human and animals disases it causes, he discovered the virus that caused western equine encephalitis and a number of similar viruses, he discovered the cause of psittacosis after falling ill with it himself. He developed a vaccine agains pneumonic plague that was used in World War II and he developed food commercail processing standard that prevented botulism contamination.
Reference
- Lederer, S. E. Meyer, Karl Friedrich. American National Biography Online Feb. 2000.