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Related to infectivity: antigenicity, toxigenicity


Capable of producing infection; infectious.

in·fec′tive·ness, in′fec·tiv′i·ty n.


1. (Pathology) capable of causing infection
2. a less common word for infectious
inˈfectively adv
inˈfectiveness, ˌinfecˈtivity n


(ɪnˈfɛk ʃəs)

1. communicable by infection, as from one person to another or from one part of the body to another.
2. causing or communicating infection.
3. tending to spread quickly and generally: infectious laughter.
4. Obs. diseased.
in•fec′tious•ly, adv.
in•fec′tious•ness, n.
syn: See contagious.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.infective - able to cause disease; "infective agents"; "pathogenic bacteria"
unhealthful - detrimental to good health; "unhealthful air pollution"; "unhealthful conditions in old apartments with peeling lead-based paint"
2.infective - caused by infection or capable of causing infection; "viruses and other infective agents"; "a carrier remains infective without himself showing signs of the disease"
infected, septic - containing or resulting from disease-causing organisms; "a septic sore throat"; "a septic environment"; "septic sewage"


[ɪnˈfektɪv] ADJ [disease, agent] → infeccioso


adj (Med) agentinfektiös; infective diseaseInfektionskrankheit f
References in periodicals archive ?
The initial application of the PRDT prion-binding affinity resin will be the reduction of TSE infectivity from red blood cells (RBC).
Lyman and his colleagues found the exposure to 50 to 100 microamperes of electricity -- comparable to that produced by a cardiac pacemaker -- reduced the infectivity of the AIDS virus (HIV) by 50 to 95 percent.
Rohwer, Director of Molecular Neurovirology, VA Medical Research Service of the University of Maryland, confirmed that PRDT's device removes the infectious prion protein to the limit of detection by in-vitro techniques and significantly reduces the level of infectivity in in-vivo models," stated Peter Edwardson, PRDT's Project Director.
Summary of methods from the 4 norovius infectivity trials * Infectivity trial (date) Virus stocks/comments ([dagger]) First (Mar 2005) Combined equal volumes of strains 149, 155, and flag2 (P0).
PRDT), a joint venture of Prometic Life Sciences Inc (Canada and UK) (TSX: PLI) and the American National Red Cross, presented today the details of the first product designed to selectively reduce the infectivity of the Transmissible Spongiform Encephalopathy (TSE) agents responsible for the transmission of classical Creutzfeldt-Jakob Disease (CJD) and variant forms of CJD (vCJD) - from plasma derived products at the 2nd European Plasma Fractionation Association (EPFA) Conference in Edinburgh, Scotland.
The epidemiology and dynamics of gametocytes are poorly understood: it is presently unknown when commitment to gametocytes first occurs during infections and what intrinsic or extrinsic factors influence gametocyte production and infectivity to mosquitoes.
This infectivity assay, without using non-infectivity assays such as PCR, has the ability to detect viable BPyV in 3 weeks or less, with increased specificity and sensitivity compared with other assays on the market.
The period of infectivity has not been definitively established, some saying it lasts from two to four days prior, until two to five days following the onset of the rash (i.
50]) and also the concentration of extracts that inhibited viral infectivity (cytopathic effect) by 50% ([IC.
Variations in the infectivity and specificity of infective juveniles (IJs) of these nematodes are influenced by diverse factors, including behavior, physiology, geographic origin and physical factors of the habitat (Doucet et al.
Washington, April 27 ( ANI ): Scientists have discovered new vulnerable site on the HIV virus that can be attacked by human antibodies in a way that neutralizes the infectivity of a wide variety of HIV strains.
The rotavirus infection rates were based on data from an infectivity trial in adults, but rotavirus primarily affects children.