Protozoa and the Illnesses They Cause - Verywell Health
Oct 19, 2025 · Protozoa are tiny, single-celled organisms that can cause diseases like malaria, giardia, and toxoplasmosis. Protozoan infections can be identified through blood, stool tests, …
About Parasites | Parasites | CDC
Nov 14, 2024 · 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 …
Parasites: Types, Symptoms, Treatment & Prevention
There are three main types of parasites, and their symptoms vary. Treatment depends on the kind of parasite you have but may include prescription medications. Practicing good hygiene, …
Protozoan Parasites: Major Human Pathogens and Their Diseases
Sep 6, 2025 · Learn about protozoan parasites: types, life cycles, diseases (amoebiasis, giardiasis, malaria), diagnosis, prevention, and nursing care.
Approach to Parasitic Infections - The Merck Manuals
Dec 3, 2015 · Protozoa can multiply in their human hosts, increasing in number to cause overwhelming infection. With rare exceptions, such as Isospora species, protozoan infections …
What Are Pathogenic Protozoa and How Do They Cause Illness?
Jul 26, 2025 · Protozoa are microscopic, single-celled organisms found widely in various environments. While many are harmless, pathogenic protozoa cause disease in humans by …
Parasites: Types, Symptoms, Treatment, Prevention - Health
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, …
Protozoan - Parasites, Pathogens, Disease | Britannica
Dec 17, 2025 · Parasitic protozoans have invaded and successfully established themselves in hosts from practically every animal phylum. The best-studied parasitic species are those of …
Parasitic infections: Types, symptoms, treatment
Nov 24, 2025 · Protozoa: Protozoa are single-celled organisms that can multiply in humans. These parasites can spread through contaminated food and water, person-to-person contact, …
List of parasites of humans - Wikipedia
List of parasites of humans Endoparasites Protozoan organisms ... Helminths (worms) Helminth organisms (also called helminths or intestinal worms) include: