fil·​a·​ri·​a·​sis ˌfi-lə-ˈrī-ə-səs How to pronounce filariasis (audio)
plural filariases ˌfi-lə-ˈrī-ə-ˌsēz How to pronounce filariasis (audio)
: infestation with or disease caused by filariae

Examples of filariasis in a Sentence

Recent Examples on the Web Ivermectin subsequently proved extremely effective in treating tropical diseases such as onchocerciasis and lymphatic filariasis, which devastate and disfigure poor people around the world; as with eflornithine, the World Health Organization listed it as an essential medicine. Christopher B. Barrett, Foreign Affairs, 25 Sep. 2023 Bangladesh Bangladesh eliminated lymphatic filariasis, a parasitic disease. Erika Page, The Christian Science Monitor, 8 Aug. 2023 Documents obtained by the advocacy group through the Freedom of Information Act show that, beginning in fall 2020, researchers used 28 beagles to test whether a vaccine candidate could prevent lymphatic filariasis, a parasitic illness transmitted by mosquitoes. Daniel Funke, USA TODAY, 12 Nov. 2021 Despite the challenges of the COVID-19 pandemic, 32,533,188 people in 12 Nigerian states received treatment for river blindness and lymphatic filariasis between April 2020 and March 2021, representing a therapeutic coverage of 70 percent and geographic coverage of 92 percent. Sarah Ferguson, Forbes, 30 Jan. 2022 Mosquitoes carry many threatening diseases, like chikungunya, dengue, lymphatic filariasis, Rift Valley fever, Yellow fever, Zika, malaria, Japanese encephalitis and West Nile fever, WHO reports. Clare Mulroy, USA TODAY, 2 Feb. 2023 In some ways, that’s promising because it could also be used to control tsetse flies, which spread sleeping sickness, and other species of mosquito that carry dengue fever and filariasis. Ed Yong, Discover Magazine, 25 Feb. 2011 Both Ōmura and Campbell discovered avermectins, a class of compounds that can kill parasitic roundworms that cause crippling diseases, such as lymphatic filariasis, otherwise known as elephantiasis, and onchocerciasis or river blindness. Rebecca Kreston, Discover Magazine, 5 Oct. 2015 Anopheles gambiae which carries malaria, and Culexquinquefasciatus, which carries lymphatic filariasis. Ed Yong, Discover Magazine, 2 June 2011 See More

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

Word History


New Latin

First Known Use

1879, in the meaning defined above

Time Traveler
The first known use of filariasis was in 1879

Dictionary Entries Near filariasis

Cite this Entry

“Filariasis.” Dictionary, Merriam-Webster, Accessed 8 Dec. 2023.

Medical Definition


variants also filariosis
plural filariases also filarioses -ˌsēz How to pronounce filariasis (audio)
: infestation with or disease caused by filariae

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