Definition of infective in English:



  • 1Capable of causing infection.

    ‘the infective eggs or larvae of the roundworm’
    • ‘Dengue fever is a viral infection caused by the dengue virus, which is transmitted by infective mosquitoes that bite particularly during the day.’
    • ‘Medical workers in mainland China-especially professionals in respiratory and infective diseases-charged to the front line in the war against SARS.’
    • ‘Dietary, infective, and systemic causes must be excluded.’
    • ‘If the virus is only minimally infective, as it seems to be, the subsequent course of its global progress will depend on stratospheric transport and mixing, leading to a fall out continuing seasonally over a few years.’
    • ‘The Department of Agriculture's primary objective in relation to BSE is to protect the consumer from any possible transmission of the infective agent through the food chain and to eradicate the disease from the national herd.’
    • ‘RV16 (1,000 50% tissue culture infective dose units) was administered on each of Study Days 0 and 1.’
    • ‘Moreover, infected infants had low levels of specific antibody to the infective serotype.’
    • ‘Protocols for detection of a vast variety of infective agents including viral, bacterial, fungal, and parasitic pathogens can be found in the literature.’
    • ‘These agents might be arthropod-transmitted viruses, water contaminated with enteric bacteria, or helminths whose infective eggs and larvae are found in soil and invertebrate hosts.’
    • ‘Our results suggest that the enzymatic, inflammatory, and infective pathogenic elements could be individually treated.’
    • ‘A key step in the control of any communicable disease is the separation of the infective agent from the susceptible hosts.’
    • ‘He had no infective, gastrointestinal, or respiratory symptoms and no arthralgias.’
    • ‘However, no ideal test exists to assess the infective potential of a patient with TB on treatment, and infectivity is unlikely to disappear immediately after multidrug therapy is started.’
    • ‘The gravid segment of the adult tapeworm breaks off and disintegrates in the large bowel, releasing hundreds of infective eggs, which then pass out with the feces.’
    • ‘A 70 year old man had had a painful ulcerated swelling of the distal segment of his left ring finger for several months; it had repeatedly been managed as an infective lesion, without improvement.’
    • ‘The news spread that the condition had no apparent cure but that vaporising white vinegar would help kill the infective agent.’
    • ‘The use of high-dose corticosteroid has been the cornerstone in the treatment of some infective or immunologic lung diseases.’
    • ‘According to this theory, an initial insult caused by an infective agent, drugs, or gluten may damage mucosal surface, leading to an autoimmune response with ongoing inflammation in susceptible individuals.’
    • ‘The technology will be applied to viral targets such as hepatitis B and herpes as well as to other infective agents.’
    • ‘The regimen should be modified after culture has identified the infective organism.’
    1. 1.1dated Infectious.
      ‘infective hepatitis’
      • ‘Causes of chronic mitral regurgitation include infective endocarditis, degenerative valvular disease (mitral valve prolapse) and rheumatic fever.’
      • ‘Streptococci and enterococci are the most frequent pathogens causing infective endocarditis.’
      • ‘The second patient was an 85-year-old man who suffered from infective endocarditis involving an aortic prosthetic valve.’
      • ‘Overall, I would summarise the position by saying that the potential for transmission of infective TSE prions to susceptible cattle, sheep and humans via environmental contamination is particularly unclear.’
      • ‘He was found to have severe mitral regurgitation associated with a ruptured mitral chord and infective endocarditis.’
      • ‘Other causes of leg swelling, erythema, and tenderness include a ruptured Baker's cyst and infective cellulitis.’
      • ‘Mitral valves with annular calcification are predisposed to developing both infective endocarditis and periannular abscesses.’
      • ‘Prophylaxis for infective endocarditis is warranted only in those patients with the true disease of thickened redundant mitral leaflets, mitral regurgitation, or both.’
      contagious, communicable, transmittable, transmissible, transferable, conveyable, spreadable, spreading
      View synonyms


Late Middle English: from Latin infectivus, from inficere to taint (see infect).