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

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

The disease is caused by Trypanosoma cruzi, a protozoan transmitted by triatomine insects, known as kissing bugs for their vampiric penchant for biting the face and sucking blood.

From Science Magazine ● Mar. 9, 2022

There is another protozoan, called blepharisma, telling a long story about the chanciness and fallibility of complex life.

From "The Lives of a Cell" by Lewis Thomas

Organisms that can survive in this suspended, or anabiotic, state, Yarzábal explained, include not just extremophile bacteria but also viruses, fungi, protozoa and microscopic animals called nematodes.

From Salon ● Apr. 20, 2025

It seems miraculous that, over billions of years, our planetary circumstances enabled protozoa to evolve into people.

From New York Times ● Nov. 12, 2023

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

Ben had awakened that morning, while it was still dark, with the butterflies, the old, invisible protozoa of fear that invaded the stomach on the days of contests or of testing.

From "The Great Santini" by Pat Conroy

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

From Reuters ● Oct. 1, 2022

The working group came up with 16 “climate-sensitive zoonotic pathogens of circumpolar concern”, consisting of 7 types of bacterium, 4 families of virus, 3 protozoans and 2 kinds of worm3.

From Nature ● Mar. 28, 2017

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

From Slate ● Oct. 31, 2014

Experiments analogous to those described here have been conducted with bacteria infected with viruses, with nuclear transplantation in protozoans and with fusion in mammalian cells.

From Scientific American ● Oct. 9, 2012

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