How to Use protozoan in a Sentence

protozoan

noun
  • The same holds true for many fungi, algae and protozoans today.
    — Quanta Magazine, 17 July 2018
  • Davis thinks a protozoan parasite that infects monarchs could be on the rise.
    — Gabriel Popkin, Scientific American, 1 Mar. 2020
  • In many parts of the world, even the water in your glass could be contaminated with protozoan parasites.
    — Bob Holmes, Discover Magazine, 21 Nov. 2018
  • But once the fish had died, the remaining dinoflagellates started to circle the protozoan.
    — Patrick Huyghe, Discover Magazine, 11 Nov. 2019
  • They were likely produced by some other cause beyond protozoan parasites.
    — Sam Walters, Discover Magazine, 4 Oct. 2022
  • The protozoan parasite is transmitted through the bite of a female mosquito.
    — Peter Fimrite, SFChronicle.com, 9 July 2020
  • While taking care of bacteria and protozoa are nice, the smaller viruses will quickly ruin your dream vacation.
    — Ashlea Halpern, Slate Magazine, 8 Dec. 2017
  • That can cause an imbalance in the oral microbiome (all the bacteria, fungi, viruses, and protozoans living in the mouth).
    — Kaitlin Sullivan, Health, 11 July 2024
  • Malaria is caused by an infection with one of five protozoan parasites of the Plasmodium genus.
    — Beth Mole, Ars Technica, 27 June 2023
  • The rest belong to micro-organisms — bacteria, fungi, protozoans and viruses — that are on and inside you.
    — Fortune, 12 June 2018
  • The culprit is a protozoan called Ophryocystis elektroscirrha, or OE for short.
    — Drew Kann, AJC.com, 12 Jan. 2026
  • Toxoplasma gondii is a ubiquitous protozoan parasite that can infect any warm-blooded species.
    — Diana Gitig, Ars Technica, 29 Nov. 2022
  • The protozoan Toxoplasma is just another stowaway within the system and one that warrants more study.
    — Gustavo Arrizabalaga and Bill Sullivan, Scientific American, 1 Mar. 2015
  • That legacy echoes in our every cell, yoking our fates to the vast unicellular realm, where creatures such as protozoans navigate threats, seek succor and sense their way from life to death.
    — Claire L. Evans, Quanta Magazine, 30 July 2025
  • Soon after, he was diagnosed with sarcocystis, a disease caused by a protozoan parasite carried by opossums.
    — Lyndsay Winkley, San Diego Union-Tribune, 22 Apr. 2023
  • The disease is caused by the protozoan parasite Plasmodium, which often grows in the liver before infecting red blood cells.
    — Uwagbale Edward-Ekpu, Quartz Africa, 21 Mar. 2020
  • The other five structures possibly represent additional worm eggs or protozoan cysts.
    — Laura Baisas, Popular Science, 9 Aug. 2023
  • This small but mighty tube makes just about any body of water drinkable thanks to its ability to remove over 99% of waterborne bacteria and protozoan parasites.
    — Jaimie Potters, Harper's BAZAAR, 7 June 2022
  • Instead, the alga survived and became a symbiotic partner to the protozoan, feeding it the fruits of its photosynthesis.
    — Kevin Hartnett, Quanta Magazine, 6 July 2023
  • With a resolution of 3 micron and a field of view of around one millimeter, this lens, which is packaged in red, allows the user to see cells and microorganisms like protozoans and water bears.
    — Courtney Linder, Popular Mechanics, 22 Nov. 2019
  • Several more of the round shapes appeared to be worm eggs of an indeterminate type, and the last shape resembled either another worm egg or evidence of a protozoan infection.
    — Matt Hrodey, Discover Magazine, 9 Aug. 2023
  • Researchers also discovered that mitochondria were shared not only by all animals but also by plants, fungi, and protozoans — one of the main branches of life, known as eukaryotes.
    — Carl Zimmer, STAT, 30 May 2018
  • The parasitic disease is caused by protozoan plasmodium and can be transmitted through infected mosquitos.
    — Natasha Dado, PEOPLE.com, 2 Dec. 2021
  • Not only that, but the wily protozoan may set up shop as an asymptomatic chronic infection that keeps shedding cysts in the feces while causing poor absorption of vitamins and carbohydrates.
    — Tony Dajer, Discover Magazine, 6 Aug. 2017
  • Once inside, prey organisms — including bacteria, protozoans like ciliates and amoebae and even tiny soil mites — are subjected to conditions with very low oxygen.
    — Scott Travers, Forbes.com, 16 Jan. 2026
  • This disease is caused by a tiny protozoan the mosquito picks up, and in some areas, mosquitoes are such effective vectors of malaria that 100 percent of them carry the disease.
    — John Sass, Field & Stream, 11 Apr. 2023
  • Induction of changes in human behaviour by the parasitic protozoan Toxoplasma gondii.
    — Rebecca Kreston, Discover Magazine, 29 Apr. 2011
  • In addition to explaining the cells’ prowess at photosynthesis, the new work helps to confirm the theory that those phytoplankton arose through a symbiotic alliance between a protozoan and a resilient green alga.
    — Kevin Hartnett, Quanta Magazine, 6 July 2023
  • Sun, who is a biologist at Central Washington University, begins his story with a protozoan called Tetrahymena thermophila.
    — Elizabeth Kolbert, New Yorker, 22 June 2026
  • A lot of alarming things can be found in bed bugs; over 45 different potential human disease agents are known, including bacteria, viruses (Hepatitis B), worms, and protozoans (like the trypanosomes in the new paper).
    — Gwen Pearson, WIRED, 18 Nov. 2014

Some of these examples are programmatically compiled from various online sources to illustrate current usage of the word 'protozoan.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.

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