RT journal article T1 Spanish–French leech trade and its consequences: From the increase in medical demand to resource depletion and technical innovation A1 Copena, Damián A1 Gómez Martín, María A2 Economía General K1 Hirudo medicinalis K1 Medical input K1 Medicinal leeches K1 Medical practice K1 Hirudiniculture K1 Leech fever K1 Rural industry K1 Rural innovation K1 Rural resources K1 Nineteenth century AB This article studies the impact caused by the success and dissemination of Broussais’ theories on the use of leeches as a medical supply on Spanish–French trade relations, as well as its consequences for the Spanish market between 1821 and the 1860s. Analysing the documents produced by the different public administrations, together with newspaper and archival sources in both Spain and France and the literature and legislation of that period, allows us to understand the evolution of this trade and the heavy impact it had on the autochthonous population of this animal resource. The article reveals how, at the beginning of the 1820s, leeches became an important medical supply and how the demand for them increased significantly. This gave rise to a trade relation between Spain and France that led to the overexploitation of the resource, the issuing of regulations on the matter, and the search for technological solutions to increase the production of leeches. PB Cambridge University Press SN 2048-8343 YR 2024 FD 2024 LK http://hdl.handle.net/10498/33498 UL http://hdl.handle.net/10498/33498 LA eng DS Repositorio Institucional de la Universidad de Cádiz RD 05-nov-2026