giar·​di·​a·​sis | \ (ˌ)jē-ˌär-ˈdī-ə-səs How to pronounce giardiasis (audio) , jē-ər-, jär- \
plural giardiases\ (ˌ)jē-​ˌär-​ˈdī-​ə-​ˌsēz How to pronounce giardiasis (audio) , jē-​ər-​ , jär-​ \

Definition of giardiasis

: infestation with or disease caused by a giardia

Examples of giardiasis in a Sentence

Recent Examples on the Web Larson herself had contracted a host of illnesses—dengue fever, hepatitis E, amoebiasis, giardiasis, eosinophilic meningitis, and cerebral malaria—and wanted to move closer to her father. Danielle Ofri, The New Yorker, 12 June 2021 Norovirus infections, which cause vomiting and diarrhea, were the second most common, with 1.3 million cases, followed by the diarrheal disease giardiasis with just over 400,000 annual cases. Sandee Lamotte, CNN, 16 Dec. 2020 One Wilderness Society staffer contracted giardiasis after drinking water running off a glacier. Keith Mccafferty, Field & Stream, 19 June 2020 Through his research and his work with diplomats and other international travelers, Dr. Wolfe became an authority on such exotic conditions as giardiasis and schistosomiasis, both of which are caused by parasites. Matt Schudel, Washington Post, 17 June 2017

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'giardiasis.' 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 giardiasis

1919, in the meaning defined above

History and Etymology for giardiasis

New Latin

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Time Traveler for giardiasis

Time Traveler

The first known use of giardiasis was in 1919

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Dictionary Entries Near giardiasis

giant wild rye







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Statistics for giardiasis

Last Updated

17 Jun 2021

Cite this Entry

“Giardiasis.” Dictionary, Merriam-Webster, Accessed 24 Jun. 2021.

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More Definitions for giardiasis


giar·​di·​a·​sis | \ (ˌ)jē-ˌär-ˈdī-ə-səs, ˌjē-ər-, jär- How to pronounce giardiasis (audio) \
plural giardiases\ -​ˌsēz How to pronounce giardiasis (audio) \

Medical Definition of giardiasis

: infestation with or disease caused by a flagellate protozoan of the genus Giardia (especially G. lamblia) that is often characterized by diarrhea

called also lambliasis

More from Merriam-Webster on giardiasis Encyclopedia article about giardiasis


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