Definition. Rickets (in children) and osteomalacia (in adults) are two forms of a metabolic bone disease resulting from vitamin D deficiency. Both cause softening and weakening of bones because of defective or inadequate bone mineralization. Rickets. Copyright Â© Nucleus Medical Media, Inc.
The flow from west to east: Disease. In terms of diseases, the Columbian Exchange was a wildly unequal affair, and the Americas got the worst of it. The flow of disease from the Americas eastward into Eurasia and Africa was either trivial or consisted of a single important infection.
Diseases . The Columbian Exchange is often times praised for the positive things that it brought about such as the exchange of new animals, foods, and plants between the Old World and the New World. However, not all of the aspects of the Columbian Exchange were positive. It is also important to realize that the Columbian Exchange can also be credited for the transmission of diseases which had adverse effects on both the Old and New World alike. Diseases were transferred from Europeans to Native Americans as well as vice versa.