On April 25, 1873, French-Canadian microbiologist Félix d’Herelle was born. D’Herelle was co-discoverer of bacteriophages (viruses that infect bacteria) and experimented with the possibility of phage therapy. D’Herelle has also been credited for his contributions to the larger concept of applied microbiology.
Félix d’Herelle began studying microbiology around the age of 24. He had just moved to Canada and began setting up his own laboratory, conducting first experiments. He then also earned a commission to study the fermentation and distillation of maple syrup to schnapps. D’Herelle’s first paper was published in 1901: “De la formation du carbone par les végétaux”. In it, the scientist demonstrates his profound scientific (self-taught) skills. D’Herelle began working for the government of Guatemala as a bacteriologist at the General Hospital in Guatemala City. As part of his job, Félix d’Herelle organized defenses against malaria and yellow fever. There, d’Herelle also studied local fungal infections of coffee plants and was given the task to explore how to make whiskey from bananas. In order to continue his work on fermentation, d’Herelle moved to Mexico and by 1909, he found a method to produce sisal schnapps. In 1911, D’Herelle moved to Paris and began working as an unpaid assistant in a lab at the Pasteur Institute. The scientist was able to increase his reputation. Back in South America, d’Herelle fought the Argentinian locust plagues with coccobacillus experiments.
After the beginning of World War I, d’Herelle and his assistants probably produced more than 12 million doses of medicine for the allied military. However, one of the few available vaccines was the smallpox vaccine, developed by Edward Jenner and most treatments were based on mercury, strychnine, and cocaine.
Already in 1896, Ernest Hanbury Hankin found out that in the waters of the Ganges and Yamuna rivers in India had marked antibacterial action against cholera and could pass through a very fine porcelain filter. The British bacteriologist Frederick Twort, back then superintendent of the Brown Institution of London, discovered a small agent that infected and killed bacteria. According to Twort, the agent must be either a stage in the life cycle of the bacteria, an enzyme produced by the bacteria themselves, or a virus that grew on and destroyed the bacteria. However, due to the outbreak of World War I and the shortage of research funds, the scientist‘s work was interrupted.
Independently from Twort, Félix d’Hérelle found and announced in 1917 that he had discovered “an invisible, antagonistic microbe of the dysentery bacillus“. Instantly, d’Hérelle understood: “what caused my clear spots was in fact an invisible microbe … a virus parasitic on bacteria“. He named the virus a bacteriophage or bacteria-eater. Félix d’Herelle is also credited with introducing the phage therapy, the therapeutic use of bacteriophages to treat pathogenic bacterial infections.
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