protozoan

Giardia duodenalis is a microscopic protozoan parasite known for causing outbreaks of severe diarrhea.

From Science Daily ● Dec. 21, 2025

One common protozoan disease known to occur in birds, which evolved from feathered dinosaurs, as well as in people is called trichomoniasis, caused by a parasitic protozoan.

From Reuters ● Oct. 1, 2022

Another common parasite is Plasmodium falciparum, the protozoan cause of malaria, a significant disease in many parts of the world.

From Textbooks ● Jun. 9, 2022

Though the idea of a mind-altering protozoan transmitted via cats is alarming, it is not necessarily harmful: roughly 30 percent of the human population is infected with the T gondii parasite.

From Salon ● Apr. 19, 2022

This is the protozoan, not yet as famous as he should be, who seems to be telling us everything about everything, all at once.

From "The Lives of a Cell" by Lewis Thomas

The host of life on ice includes bacteria, viruses, fungi, protozoa, even microscopic animals like nematodes, some dead and some alive in suspended animation.

From Salon ● Apr. 24, 2025

Bottom line: If you must have tropical milkweed, cut it down to the ground each fall before it goes to seed, to kill any overwintering protozoa and reduce its potential to spread to neighboring areas.

From Los Angeles Times ● Oct. 30, 2023

Food turns into compost through the hard work of small microorganisms like bacteria, fungi, and protozoa.

From National Geographic ● Sep. 26, 2023

You should make sure that you use only distilled, sterile or boiled water for your rinses, as tap water can contain small amounts of bacteria and protozoa that carry the risk of other infections.

From Seattle Times ● Oct. 31, 2022

Scientists in Czechoslovakia are experimenting with protozoa against webworms and other insect pests, and in the United States a protozoan parasite has been found to reduce the egg- laying potential of the corn borer.

From "Silent Spring" by Rachel Carson

That figure does not even count certain bacteria, viruses, fungi and protozoans that are also considered to be parasitic.

From New York Times ● Jan. 9, 2023

The researchers explored whether the holes had been caused by an infection involving microbes called protozoans.

From Reuters ● Oct. 1, 2022

His companion guide to garden science is a learned romp through plant biology; solar energy and soil nutrients; the movement of vines; and “fellow gardeners”, from single-celled protozoans to beetles.

From Nature ● Mar. 20, 2018

There he photographed protozoans called ciliates that were found for the first time only in 2007.

From Slate ● Oct. 31, 2014

The scoutmaster had given them a long lecture about disrupting nature—by the end of it, Jonah felt guilty about how many protozoans he’d probably killed.

From "Found" by Margaret Peterson Haddix