: 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
: caused by or resulting from an infection with one or more pathogenic agents
infective bacterial endocarditis
: 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 WebPeople typically get malaria by being bitten by an infective female Anopheles mosquito.—Sara Moniuszko, CBS News, 5 Oct. 2023 The parasite becomes infective one to five days after it is passed in the feces of the cat.—Joe Mutascio, The Indianapolis Star, 21 Aug. 2023 Symptoms usually appear seven to 30 days after an infective bite and include high fever, chills, body aches, diarrhea and vomiting, Maryland health department officials said.—Minnah Arshad, USA TODAY, 19 Aug. 2023 Alternatively, if raccoons occupy chimneys, infective feces can settle within and around fireplaces, contaminating the home.—Rebecca Kreston, Discover Magazine, 29 Mar. 2012 Malaria is a serious disease transmitted through the bite of an infective female anopheline mosquito, according to the CDC.—Jane Onyanga-Omara Julius Lasin
usa Today, USA TODAY, 27 June 2023 Specifically, the agencies test for enterococcus, a bacteria that is a common cause of infections, including UTIs, bacteremia and infective endocarditis, according to the National Institutes of Health.—Margaret Kates | Mkates@al.com, al, 21 June 2023 That infective ambiance might have been enough to propel a less pointed novel about pregnancy.—Talya Zax, Washington Post, 13 June 2023 After dogs defecate in the pens, the hookworm eggs hatch, and the larvae eventually molt, reaching their infective stage within five to 10 days.—Bradley Van Paridon, Scientific American, 1 June 2023 See More
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'infective.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
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