infective

adjective
in·​fec·​tive | \ in-ˈfek-tiv How to pronounce infective (audio) \

Definition of infective

a : producing or capable of producing or transmitting infection infective oocysts are ingested with contaminated feed or water.— Douglas N. Stern Affected cats not yet showing signs of illness may shed the virus and be infective to other cats …Cat Fancy
b : caused by or resulting from an infection with one or more pathogenic agents infective bacterial endocarditis
c : affecting others : spreading easily to others Different teachers will demonstrate different skills and strengths. Some will have … an infective enthusiasm for their own subject.— Jonathan Glazzard et al.

Examples of infective in a Sentence

Recent Examples on the Web But scientists hypothesize that a combination of habitat change, pesticide exposure and the emergence of infective chytrid fungus led to their demise. Douglas Main, Scientific American, "Once-Extinct Toads Reintroduced to Wild," 13 Dec. 2012 Toxoplasmosis organisms need time after being passed in the cat’s feces to become infective. Star Tribune, "Cats don't have to be a danger to pregnant women," 6 Nov. 2020 Antibodies are powerful anti-infective treatments, but they are generally thought to work best at early stages of the disease. Robert Langreth, Bloomberg.com, "Eli Lilly Says Other Antibody Trials Ongoing After NIH Pause," 14 Oct. 2020 By sowing the seeds of doubt and denial, anti-vaxxers could influence many people not to get a vaccine, allowing the virus to persist and be persistently infective. Jonathan M. Berman, STAT, "Believers need to be as prepared for a Covid-19 vaccine as anti-vaxxers are against it," 9 Sep. 2020 What to know about Cyclospora infection, according to the CDC : On average, symptoms start, 7 days after swallowing the infective form of the parasite). Susan Selasky, Detroit Free Press, "Bagged salads sold at several Midwest stores linked to intestinal infection outbreak," 23 June 2020 Coronaviruses in general rely on electrostatic interactions to assemble themselves into an infective form and attach to a host. Eric Litke, USA TODAY, "Fact check: Early research shows fabric could neutralize coronaviruses," 30 May 2020 Some recruits were sent to Yerba Buena, but they were not allowed onto the island ferry until a topical anti-infective solution had been sprayed into the upper part of the throat behind the nose. Mark Johnson, Milwaukee Journal Sentinel, "Extreme actions during Spanish flu may preview decisions on coronavirus today," 7 Mar. 2020 As the membranes fuse, the virus releases its genes into the cell, which produces billions of copies of the virus; these viral particles in turn break out of the cell and spread to other cells, where the infective process repeats. Scientific American, "20 Years in the Making: A New Approach to a Vaccine against HIV," 12 May 2020

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

14th century, in the meaning defined at sense 1

History and Etymology for infective

Middle English infectif "causing disease, infectious," borrowed from Medieval Latin infectīvus "infectious, poisonous" (Latin, "used for dyeing"), from Latin infectus, past participle of inficere "to dye, discolor, taint, contaminate with disease" + -īvus -ive — more at infect

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The first known use of infective was in the 14th century

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Last Updated

17 Mar 2021

Cite this Entry

“Infective.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/infective. Accessed 9 May. 2021.

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More Definitions for infective

infective

adjective
in·​fec·​tive | \ in-ˈfek-tiv How to pronounce infective (audio) \

Medical Definition of infective

a : producing or capable of producing or transmitting infection infective oocysts are ingested with contaminated feed or water.— Douglas N. Stern … a strain of bacteria which forms spores that can remain infective for as long as fifty years.— Sue Hubbell Affected cats not yet showing signs of illness may shed the virus and be infective to other cats …Cat Fancy
b : caused by or resulting from an infection with one or more pathogenic agents infective bacterial endocarditis

More from Merriam-Webster on infective

Thesaurus: All synonyms and antonyms for infective

Britannica English: Translation of infective for Arabic Speakers

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