Parasites need a host to survive and spread. There are three main types, and their symptoms vary. Stay away from others if you have a parasite to prevent the spread.

Clinically, the life-long presence of the parasite in tissues of a majority of infected individuals is usually considered asymptomatic. However, a number of studies show that this 'asymptomatic infection' may …

Nov 14, 2024 · 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: …

Nov 17, 2025 · Which Parasites Can Affect Humans? Three main types of parasites infect humans: protozoa, helminths, and ectoparasites. Each has a unique way of spreading, multiplying, and …

Oct 14, 2025 · It is estimated that 3 out of 5 Americans will be affected by parasites at some point in their lives. Learn about the various types of parasites, symptoms, and the sources of infection and …

Aug 18, 2025 · We asked experts how parasites are transmitted, what it feels like to be infected, and what you can do to protect yourself.

Mar 2, 2022 · There are three main types of parasites that can affect humans: protozoa, helminths, and ectoparasites. These parasites can live on or in the human body and cause various diseases.

Jul 2, 2025 · Parasites in humans may cause bloating, fatigue, or gut issues. Learn the symptoms, types, causes, tests, and natural ways to treat and prevent infection.

There are three main types of parasites that cause infections in humans: Protozoa. Helminths. Ectoparasites. Protozoa are single-celled parasites. They can infect your blood, intestinal tract (gut), …

Dec 3, 2015 · Hundreds of millions of humans are infected with nematodes that live in the intestines and are transmitted by ova or larvae in feces; the most common are Ascaris (ascariasis), Enterobius …