# Pasteur communicates the memoir on so-called lactic fermentation

Date: 1857

## The fact

In 1857 [Louis Pasteur](/people/louis-pasteur) communicated a memoir on lactic fermentation, arguing that a specific living organism, not a mere soluble catalyst, drove the souring process under study. The dated public instrument is that memoir as received by the Paris scientific public, not a finished factory statute and not germ theory as later taught in schools. He was moving from Lille industrial questions toward a general claim that fermentations are life processes of particular microbes. Liebig’s chemical theory remained the rival. This Fact stores Pasteur’s 1857 lactic paper. Alcoholic fermentation, vinegar, and beer books are later rows.

## Context

Beet-alcohol and dairy spoilage made fermentation a money question in the Nord. Pasteur’s move was to isolate, microscopically and by culture practice, an organism associated with lactic souring. The paper is not a complete Koch-style pure culture in the later German sense. It is also not a medical vaccine. Claude Bernard and other physiologists worked nearby on related metabolic questions; they did not sign this memoir.

## Evidence and sources

Gallica at https://gallica.bnf.fr/ holds the nineteenth-century French serials in which Pasteur’s fermentation memoirs circulated. The 2024 FEMS historical essay at https://academic.oup.com/femsre/article/48/3/fuae010/7659358 independently places the lactic memoir in the career that later reached Pouilly-le-Fort and rabies.

Official or archival record: Gallica — printed Pasteur papers and Comptes rendus (https://gallica.bnf.fr/; Bibliothèque nationale de France).

## Significance

Industrial-knowledge path: spoilage as biology. Modest weight because a memoir is not a plant. High confidence on the 1857 communication.

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

## What is established and what is not

Established: Pasteur’s lactic-fermentation memoir belongs to 1857. Not established: that every later yoghurt works because of this paper, or that Liebig was experimentally silent. Contribution is recorded as He authored the memoir from Lille/Paris work. Distillers posed the spoilage questions; the Academy printed the note. The impact note is Treating a spoilage fermentation as the work of a living organism rather than of a mere chemical catalyst redirected industrial microbiology, a modest industrial-policy path. The dated heading stays Pasteur communicates the memoir on so-called lactic fermentation on 1857-11-30, not a later statue, UNESCO listing, or school film. Printers, unnamed clerks, and later editors may appear in the same file without becoming this instrument.

Confidence is stated on the impact path, not hidden in adjectives. Lactic souring is not wine heat and not anthrax. Mixed effects of Pasteur communicates the memoir on so-called lactic fermentation are separate paths.

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

The contribution type is direct. The attached driver is [industrial-policy-activism](/drivers/industrial-policy-activism). The welfare reading used in this dossier is improving. That reading is an impact-path choice, not a property stored on the Fact itself.

Shared responsibility is part of Pasteur communicates the memoir on so-called lactic fermentation. Naming Louis Pasteur does not delete co-authors, institutions, or later transmitters. The lag from 1857-11-30 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.

## People

- Louis Pasteur: https://factrail.ai/people/louis-pasteur

## Drivers

- Industrial-Policy Activism: https://factrail.ai/drivers/industrial-policy-activism

## Sources

- https://academic.oup.com/femsre/article/48/3/fuae010/7659358
- https://gallica.bnf.fr/

## Methodology

https://factrail.ai/methodology

Canonical: https://factrail.ai/facts/pasteur-lactic-fermentation-1857