How to Use bacterium in a Sentence

bacterium

noun
  • More on the Black Death: The plague was caused by the Yersinia pestis bacterium.
    Emilie Le Beau Lucchesi, Discover Magazine, 19 Dec. 2022
  • The bacterium was found in the boy's brain, lung, liver, and spleen.
    Beth Mole, Ars Technica, 10 Aug. 2022
  • The clear spots are areas where phage have killed the bacterium.
    David A. Shaywitz, WSJ, 4 Aug. 2023
  • All three forms are caused by the Yersinia pestis bacterium.
    Ryan W. Miller, USA TODAY, 14 Nov. 2019
  • Scientists at the time did not even know that a virus, not a bacterium, caused the flu.
    Scott Hershberger, Scientific American, 13 Aug. 2020
  • The disease is caused by a bacterium called Yersinia pestis.
    Ari Daniel, NPR, 3 June 2024
  • Plague is a disease caused by the bacterium Yersinia pestis.
    Amanda MacMillan, Health.com, 13 June 2018
  • The bacterium is present in deer ticks in the Northeast and Midwestern US.
    Jocelyn Solis-Moreira, Popular Science, 27 Mar. 2023
  • One is caused by fungi and the other is caused by a bacterium.
    Tim Johnson, Chicago Tribune, 19 Aug. 2023
  • Sheldon thought this rule might govern all life in the ocean, from the smallest bacterium to the largest whales.
    Matt Reynolds, Wired, 23 Nov. 2021
  • The sugar sparked a series of events in each bacterium.
    Theresa MacHemer, Smithsonian Magazine, 16 Jan. 2021
  • So yes, the astonishing size of the bacterium is, well, big news.
    Caroline Delbert, Popular Mechanics, 12 July 2022
  • The green color comes from the chlorophyll, which is a natural part of the bacterium.
    Yousong Ding, Washington Post, 9 May 2018
  • There are many different strains of E. coli, a bacterium, and most of them live in our guts and don’t cause any harm.
    Julia Belluz, Vox, 29 June 2018
  • The bacterium is often found in the nose and throat of people without causing the disease.
    Monique Calello, USA TODAY, 2 Sep. 2023
  • Gros also found the bacterium attached to oyster shells, rocks and glass bottles in the swamp.
    Christina Larson, ajc, 23 June 2022
  • The beams, roughly the size of a bacterium, could oscillate up and down like a plucked guitar string.
    Gabriel Popkin, Science | AAAS, 25 Apr. 2018
  • Yersinia pestis, the bacterium that caused the plague in the 14th century, was carried around the world by fleas attached to people and rats.
    Matthew Brown, USA TODAY, 18 Mar. 2020
  • There is no cure for foulbrood, which is caused by the larvae of the bacterium Paenibacillus.
    Catherine Garcia, The Week, 5 Jan. 2023
  • The plague-causing bacterium Yersinia pestis is dated to have first emerged in humans about 5,000 years ago.
    Amarachi Orie, CNN, 20 Jan. 2023
  • This is the most serious E. coli outbreak since 2006, when the bacterium spread from spinach.
    Helena Oliviero, ajc, 19 May 2018
  • These and others, like the bacterium behind the Black Death, have killed tens of millions of people over the centuries.
    Cecilia.butini, Vox, 4 June 2024
  • There is a nasty bacterium that cats have in their mouths called Pasteurella.
    Cathy M. Rosenthal, San Antonio Express-News, 4 Aug. 2022
  • The first sign is usually a lesion, a small, round and painless bump where the bacterium entered the body.
    Matthew Ormseth, courant.com, 6 Apr. 2018
  • Scientists used a bacterium to clone each piece of the genome, and then studied them in smaller groups.
    Manasee Wagh, Popular Mechanics, 1 Apr. 2022
  • The disease was caused by a bacterium that would later become known as Yersinia pestis.
    Evan Bush, NBC News, 15 June 2022
  • This oral bacterium is one of the major causes of tooth decay.
    Laura Baisas, Popular Science, 27 Mar. 2024
  • The real culprit is a bacterium called Yersinia pestis.
    Jennifer Ouellette, Ars Technica, 14 Oct. 2019
  • Rice contains a bacterium called Bacillus cereus, which can cause food poisoning.
    Thomas G. Moukawsher, Newsweek, 30 Jan. 2025
  • These days, the disease, which is caused by the bacterium Mycobacterium tuberculosis, is treated with specific antibiotics — sometimes for as long as nine months, the Cleveland Clinic says.
    Cara Lynn Shultz, People.com, 27 Jan. 2025

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

Last Updated: