PATHOLOGY

Detailed explanation-1: -Protozoa can be found in almost every place you can imagine here on Earth. From the deepest part of the ocean, to the top of the highest mountain, protozoa are there. They can be found in ponds, streams, rivers, swamps and in most soil.

Detailed explanation-2: -Parasitic organisms are found almost everywhere, from tropical and sub-tropical regions to freezing places like Antarctica. Yet, what every parasite needs is an organism that provides food, shelter, and a place to reproduce. This organism is called a host.

Detailed explanation-3: -Most humans have at least one species of protozoa inhabiting their bodies. These organisms live in a variety of ecological niches from the gut to the brain. Some species live intracellularly while others are extracellular.

Detailed explanation-4: -Protozoa are microscopic, one-celled organisms that can be free-living or parasitic in nature. They are able to multiply in humans, which contributes to their survival and also permits serious infections to develop from just a single organism.