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Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort

On 5 May 1881 an anthrax vaccination trial opened at Pouilly-le-Fort near Melun; on 2 June 1881 the public comparison showed vaccinated sheep alive and unvaccinated controls dead after challenge. Pasteur then reported the trial to the learned public. In the causal graph this event weakens Infectious-Disease Transmission, a driver that weakens Life expectancy at birth — an improving welfare path.

Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort
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On 5 May 1881 an anthrax vaccination trial opened at Pouilly-le-Fort near Melun; on 2 June 1881 the public comparison showed vaccinated sheep alive and unvaccinated controls dead after challenge. Pasteur then reported the trial to the learned public. Hippolyte Rossignol’s farm, the veterinary society’s dare, and a press gallery made it a spectacle. It is veterinary anthrax, not rabies, and not a later national immunisation statute.

Context

Toussaint and others were already publishing anthrax-vaccination claims. Koch had identified the bacillus. Pasteur’s group offered attenuation as a method. Chamberland and Roux did much of the tube work. Sharing that labour does not erase Pasteur’s public direction of the trial. What was injected, oxygen attenuation versus potassium bichromate, is the subject of a later methodological controversy row.

If a number is not in the two records named above, it is not supplied here.

Why it matters

Infectious-disease path: weakening transmission in a veterinary demonstration that later licensed human hopes. Mid weight, not a ministry. High confidence on the public outcome; method details sit on the contested row.

Later competitions, monuments, translations, UNESCO listings, museums, and adaptations are not converted into extra lifetime acts.

Who was responsible

Contribution type and responsibility level for each recorded actor — not sole-author shorthand.

  • Louis Pasteur

    Person

    Direct responsibility

    responsibility level 0.44 · verified

    He directed the protocol and the public claim. Roux, Chamberland, veterinarians, and the farmer Rossignol ran animals.

What changed

Fact → Driver → Indicator. Relationship strength orders the paths; it is not the observed indicator movement.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.FEMS Microbiology Reviews — Louis Pasteur, a child of the JuraOxford University Press / FEMS · High credibility · verified
  2. 2.Institut Pasteur — HistoryInstitut Pasteur · High credibility · verified
What the sources establish

Institut Pasteur history at https://www.pasteur.fr/en/institut-pasteur/history (opens in a new tab) places Pouilly-le-Fort in the vaccine sequence before rabies. FEMS at https://academic.oup.com/femsre/article/48/3/fuae010/7659358 (opens in a new tab) independently dates 3 May / June 1881 as a public anthrax demonstration. The two URLs differ.

Established: a public Pouilly-le-Fort trial in May–June 1881 showed a survival contrast Pasteur reported. Not established: that the injected preparation was exactly the oxygen-attenuated vaccine of the public story in every tube. Contribution is recorded as He directed the protocol and the public claim. Roux, Chamberland, veterinarians, and the farmer Rossignol ran animals. The dated heading stays Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort on 1881-06-02, not a later statue, UNESCO listing, or school film.

That reading is an impact-path choice, not a property stored on the Fact itself.

Confidence is stated on the impact path, not hidden in adjectives. Mixed effects of Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort are separate paths.

Shared responsibility is part of Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort. Naming Louis Pasteur does not delete co-authors, institutions, or later transmitters. The lag from 1881-06-02 to any measured indicator is not treated as zero. Alternative explanations — weather, other armies, later statutes, or independent cultural change — remain live where the sources do not close them.

Causal path

How this event connects to drivers and indicators in the graph.

  1. ActorLouis Pasteur
  2. contributed toFactPasteur reports the public anthrax vaccination trial at Pouilly-le-Fort
  3. weakensDriverInfectious-Disease Transmission
  4. weakensIndicatorLife expectancy at birth

Cite this page

Factrail. (2026). Pasteur reports the public anthrax vaccination trial at Pouilly-le-Fort. Factrail. https://factrail.ai/facts/pasteur-pouilly-le-fort-1881

https://factrail.ai/facts/pasteur-pouilly-le-fort-1881

Accessed 15 October 2026.

By the Factrail desk · Method: how we source and score · Last reviewed

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