Botulinum toxin
In 1895 (seventy-five years later), Émile van Ermengem, professor of bacteriology and a student of Robert Koch, correctly described "Clostridium botulinum" as the bacterial source of the toxin. Thirty-four attendees at a funeral were poisoned by eating partially salted ham, an extract of which was found to cause botulism-like paralysis in laboratory animals. Van Ermengem isolated and grew the bacterium, and described its toxin, which was later purified by P Tessmer Snipe and Hermann Sommer.
Nomenclature of monoclonal antibodies
Emil von Behring and Kitasato Shibasaburō discovered in 1890 that diphtheria and tetanus toxins were neutralized in the bloodstream of animals by substances they called "antitoxins", which were specific for the respective toxin. Behring received the first Nobel Prize in Physiology or Medicine for their find in 1901. A year after the discovery, Paul Ehrlich used the term "antibodies" (German "Antikörper") for these antitoxins.