Skip to content
eventVerified

Louis Thuillier dies of cholera on the Pasteur mission sent to Alexandria

On 19 September 1883 Louis Thuillier, a young member of the mission Pasteur had sent to study cholera in Alexandria, died of the disease. In the causal graph this event weakens Humanitarian Access, a driver that strengthens People Internally Displaced by Conflict and Violence (IDMC) — an improving welfare path.

Read the full account

On 19 September 1883 Louis Thuillier, a young member of the mission Pasteur had sent to study cholera in Alexandria, died of the disease. Roux, Isidore Straus, and Edmond Nocard were on the same Egyptian assignment. Koch’s German team was in Egypt too. The mission did not deliver a working cholera vaccine. It did cost a life the laboratory then commemorated.

Context

Cholera in Egypt in 1883 was an international scientific race as well as a humanitarian disaster. Pasteur himself did not travel. Sending juniors into an epidemic without a specific protection is the welfare issue stored here. Koch’s group left with a bacillus claim; Pasteur’s group left with a funeral. That contrast is historical, not a cartoon of German virtue.

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

Why it matters

Humanitarian-harm path: research tourism into an epidemic. Mid weight for the named dead, modest for Egyptian mortality Pasteur did not command. High confidence on Thuillier’s death in Alexandria in September 1883.

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 0.32 · verified

    He dispatched the team. Thuillier died; Roux, Straus, and Nocard shared the mission; Egyptian patients were already dying.

What changed

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

    1. FactLouis Thuillier dies of cholera on the Pasteur mission sent to Alexandria
    2. weakensDriverHumanitarian Access
    3. strengthensIndicatorPeople Internally Displaced by Conflict and Violence (IDMC)
    Improving path

    impact weight 0.35 · Effect from 19 September 1883 · verified

    A poorly protected research mission into an epidemic that killed a named assistant is a humanitarian-access failure path, not a successful vaccine.

Evidence

The sources behind this fact and its verification state.

Verified2 sources on file
  1. 1.Britannica — Louis PasteurEncyclopaedia Britannica · 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) records the laboratory’s overseas missions and the human cost inside the founder’s lifetime. Britannica at https://www.britannica.com/biography/Louis-Pasteur (opens in a new tab) independently places assistants, including those who died in the field, in the Pasteur circle.

Established: Thuillier died of cholera on the 1883 Pasteur mission to Egypt. Not established: that Pasteur intended the death, or that the mission uniquely worsened Alexandria’s epidemic curve. Contribution is recorded as He dispatched the team. Thuillier died; Roux, Straus, and Nocard shared the mission; Egyptian patients were already dying. The impact note is A poorly protected research mission into an epidemic that killed a named assistant is a humanitarian-access failure path, not a successful vaccine. The dated heading stays Louis Thuillier dies of cholera on the Pasteur mission sent to Alexandria on 1883-09-19, 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. Thuillier’s death is not Koch’s comma bacillus paper. Mixed effects of Louis Thuillier dies of cholera on the Pasteur mission sent to Alexandria are separate paths.

Shared responsibility is part of Louis Thuillier dies of cholera on the Pasteur mission sent to Alexandria. Naming Louis Pasteur does not delete co-authors, institutions, or later transmitters. The lag from 1883-09-19 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 toFactLouis Thuillier dies of cholera on the Pasteur mission sent to Alexandria
  3. weakensDriverHumanitarian Access
  4. strengthensIndicatorPeople Internally Displaced by Conflict and Violence (IDMC)

Cite this page

Factrail. (2026). Louis Thuillier dies of cholera on the Pasteur mission sent to Alexandria. Factrail. https://factrail.ai/facts/pasteur-thuillier-alexandria-1883

https://factrail.ai/facts/pasteur-thuillier-alexandria-1883

Accessed 15 October 2026.

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

Dispute this factNamed here, or represent someone who is? Request a right of reply.