cryp·​to·​spo·​rid·​i·​um | \ ˌkrip-tō-spȯr-ˈi-dē-əm How to pronounce cryptosporidium (audio) \
plural cryptosporidia\ ˌkrip-​tō-​spȯr-​ˈi-​dē-​ə How to pronounce cryptosporidia (audio) \

Definition of cryptosporidium

: any of a genus (Cryptosporidium of the order Coccidia) of protozoans parasitic in the gut of vertebrates including humans and sometimes causing diarrhea

Examples of cryptosporidium in a Sentence

Recent Examples on the Web

Also detected in some of the wells during April testing were illness-causing pathogens such as salmonella, rotavirus and cryptosporidium. USA TODAY, "Momoa at Mauna Kea, Confederate context, Guthrie garbage tribute: News from around our 50 states," 2 Aug. 2019 The parasite is cryptosporidium, or crypto for short. Eliott C. Mclaughlin, CNN, "CDC issues warning on 'crypto' fecal parasite that can live for days in swimming pools," 30 June 2019 Outbreaks of the parasite cryptosporidium, known as crypto, have increased year after year, the CDC says in a new report. Julie Mazziotta,, "Diarrhea-Causing Illness from Swimming Pools — Known as 'Crypto' — Is on the Rise, CDC Says," 28 June 2019 According to Sawyer, the filter removes 99.99999 percent of salmonella, cholera, and E.coli and 99.9999 percent of cryptosporidium and giardia, without requiring batteries, chemicals, or replaceable filters. Kari Bodnarchuk,, "Here, there, and everywhere," 18 June 2019 And though pool water is usually treated with chemicals and chlorine, The New York Times explained that there's a bacteria called cryptosporidium that can outlast all of that and hide in the water for nearly a week. Lauren Rearick, Teen Vogue, "The CDC Warns of Possible Dangerous Bacteria in Pool Water," 18 May 2018 In the past two years, outbreaks of cryptosporidiosis, a parasitic disease caused by the bacteria cryptosporidium, have affected hundreds of people. Agnel Philip, azcentral, "Pool season is crypto season: How to lower the odds of getting infected," 26 May 2018 Hard to kill Standard chlorine takes a long time to kill the cryptosporidium bacteria. Agnel Philip, azcentral, "Pool season is crypto season: How to lower the odds of getting infected," 26 May 2018 One of the top causes of post-swim illness is a parasite called cryptosporidium (crypto for short), which leads to diarrhea, stomach pain and nausea. Dr. Roshini Raj,, "3 Things You Can Catch from a Pool," 23 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cryptosporidium.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of cryptosporidium

1910, in the meaning defined above

History and Etymology for cryptosporidium

borrowed from New Latin, genus name, from crypto- crypto- + sporidium "small spore," from spora spore entry 1 + -idium -idium

Note: Taxon introduced by the American physician and parasitologist Ernest E. Tyzzer (1875-1965) in "A sporozoan found in the peptic glands of the common mouse," Proceedings of the Society for Experimental Biology and Medicine, vol. 5 (1907-08), pp. 12-13.

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19 Aug 2019

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The first known use of cryptosporidium was in 1910

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cryp·​to·​spo·​rid·​i·​um | \ ˌkrip-tō-spȯr-ˈid-ē-əm How to pronounce cryptosporidium (audio) \

Medical Definition of cryptosporidium

1 capitalized : a genus of protozoans of the order Coccidia that are parasitic in the gut of many vertebrates including humans and that sometimes cause diarrhea especially in individuals who are immunocompromised (as in AIDS)
2 plural cryptosporidia\ -​ē-​ə How to pronounce cryptosporidia (audio)\ : any protozoan of the genus Cryptosporidium

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concealment of treason or felony

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