© C. Degueurce - Musée Fragonard de l’École nationale vétérinaire de Maisons-Alfort

Colourful plaster cast of a horse spleen with tuberculosis

This giant spleen is deformed with large abscesses, the famous tubercles that gave the disease its name. Like all other domestic species, the horse could be infected by this disease, which was, before the BCG's implementation of vaccination in 1921, the leading cause of death of the humans.