Tomaso Casoni (Figure 1A &1B) earned his fame by the test named after him [1]. Casoni was first to describe a test for immediate allergic reaction to hydatid fluid injected into the skin (Figure 2). This was in a time when hydatid disease caused by infection by Echinococcus granlulosus was endemic in Europe. Africa and the Middle East in addition to many other parts of the world. https://knifejoyers.shop/product-category/backpacks/