One group is the Ciliates <silly-ates>, which are generally the largest protozoa. They have hair-like projections called cilia <silly-uh> and they eat the other two types of protozoa as well as bacteria. You can just see the thin cilia poking out around the edges of the protozoan in the image to the right.
http://www.microbeworld.org/types-of-microbes/protista/protozoa
The easy-to-use filter fits into a portable sport bottle and is capable of treating up to 75 gallons of water, In addition to anthrax spores, the filter removes other bacteria, cysts, and protozoa. Water bottle filter removes anthrax spores.
http://medical-dictionary.thefreedictionary.com/protozoa
The name protozoa means “first animals.” As the principal hunters and grazers of the microbial world, protozoa play a key role in maintaining the balance of bacterial, algal, and other microbial life. They also are themselves an important food source for larger creatures and the basis of many food chains.
http://www.microbeworld.org/types-of-microbes/protista/protozoa
Parasitic infections begin when a person comes into contact with a disease-causing parasite like tapeworms, roundworms. You can contract these types of infections through contact with contaminated food, soil or water, often in tropical regions.
https://www.sharecare.com/health/parasitic-infections/what-are-protozoan-infections
A Honor Society of Nursing (STTI) answered. Single-celled parasites living and multiplying in the body are referred to as protozoan infections. The general term for these parasites is protozoa. Protozoa enter the body through the mouth or skin. Protozoa that enter through the mouth usually do so through unclean water or food. Protozoa that enter through the skin usually do so through an insect bite.
https://www.sharecare.com/health/parasitic-infections/what-are-protozoan-infections
Primitive, single-celled, microscopic animals able to move by amoeboid action or by means of CILIA or whip-like appendages (flagella). Many protozoa are parasitic on humans and are of medical importance. These include the organisms that cause AMOEBIASIS, BALANTIDIASIS, CRYPTOSPORIDIOSIS, GIARDIASIS, ISOSPORIDIOSIS, LEISHMANIASIS, MALARIA, SLEEPING SICKNESS, TOXOPLASMOSIS and TRICHOMONIASIS.
http://medical-dictionary.thefreedictionary.com/protozoa
The phylum of the kingdom Protista that includes unicellular, animal-like microorganisms. Many protozoa are saprophytes that live on dead matter in water and soil. Many parasitic protozoa infect only humans without adequate immunological defenses although a few infect the immunocompetent.
http://medical-dictionary.thefreedictionary.com/protozoa
Protozoan infections are parasitic diseases caused by organisms formerly classified in the Kingdom Protozoa. They include organisms classified in Amoebozoa, Excavata, and Chromalveolata. Examples include Entamoeba histolytica, Plasmodium (some of which cause malaria), and Giardia lamblia. Trypanosoma brucei, transmitted by the tsetse fly and the cause of African sleeping sickness, is another example.
https://en.wikipedia.org/wiki/Protozoan_infection
Protozoan infections in animals may be caused by organisms in the sub-class Coccidia (disease: Coccidiosis) and species in the genus Besnoitia (disease: Besnoitiosis).
https://en.wikipedia.org/wiki/Protozoan_infection
Protozoa mainly feed on bacteria, but they also eat other protozoa, bits of stuff that has come off of other living things—what's generally called organic matter—and sometimes fungi. Some protozoa absorb food through their cell membranes. Others, like the amoebas <ah-me-buhs>, surround food and engulf it.
http://www.microbeworld.org/types-of-microbes/protista/protozoa
what is a protozoan
A protozoan is the first animal. Protozoa means first animals.