Advantages versus disadvantages of parasitism

Abstract

The definition of a parasite leads us to the idea that it uses a host on which, or in which it lives and gets its food from or at the expense of its host. Continuing scholastic exploration of parasite data, we will find that over 259 species  produce over 115 parasitic diseases that affect over 1 billion people annually. In the paper below, we try to emphasize aspects of parasitism that bring some benefits to the hosts, in this ecological relationship that has existed since the  appearance of the first life forms on earth