Protozoal intestinal diseases are caused by various microscopic single-celled organisms called protozoa. These infections, while often overshadowed by bacterial and viral diseases, can have a significant impact on an individual's health. In this article, we will explore some lesser-known but important protozoal intestinal diseases, including Balantidiasis, Giardiasis, Cryptosporidiosis, Isosporosis, and other specified protozoal infections.