According to the CDC, a parasite is an organism that lives on or in a host organism and gets its food from or at the expense of its host.
There are three main classes of parasites that can cause disease in humans: protozoa, helminths, and ectoparasites.
According to the Centers for Disease Control (CDC), there are three main types of parasites that can cause disease in humans:
Protozoa are one-celled, microscopic organisms. They’re able to multiply in humans, causing serious infections to develop from just one single organism. Protozoa can be transferred to humans through a fecal-oral route from contaminated food or water, or from the bite of an insect such as a mosquito…..Readmore