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opportunistic infection medical definition

because of a weakened immune system. An infection by a microorganism or virus that normally does not cause disease but becomes pathogenic when the body's immune system is impaired, as in AIDS patients. Terms of Use. https://medical-dictionary.thefreedictionary.com/opportunistic+infection, invasion and multiplication of microorganisms in body tissues, as in an infectious disease. Ideal candidates may include: Clinical investigators with expertise in the treatment and prevention of HIV-related opportunistic infections This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. To evaluate incidence of opportunistic infections (OIs) in patients with rheumatoid arthritis (RA) treated with abatacept in clinical trials. pyogenic infection infection by pus-producing organisms, most commonly species … See also opportunistic condition, opportunistic microorganism. Meaning of opportunistic infection. The human immunodeficiency viruses (HIV) are two species of Lentivirus (a subgroup of retrovirus) that infect humans.Over time, they cause acquired immunodeficiency syndrome (AIDS), a condition in which progressive failure of the immune system allows life-threatening opportunistic infections and cancers to thrive. intended for use by clinicians and other health-care workers providing medical care for children living with HIV (CLHIV) and children exposed to but not infected by HIV in the United States. Opportunistic infections (OIs) are defined as infections that are more frequent or more severe because of immune suppression in HIV-infected patients, and they are … The protozoon Pneumocystis carinii infects nearly everyone at some point in life but never causes disease unless the immune system is severely depressed. However, a compromised immune system, which is seriously debilitated and has lowered resistance to infection, a The HIV virus itself does not cause death, but the opportunistic infections that occur because of its effect on the immune system can. Opportunistic Infections: An infection caused by an organism which becomes pathogenic under certain conditions, e.g., during immunosuppression. The HIV virus itself does not cause death, but the opportunistic infections that occur because of its effect on the immune system can. opportunistic infection is a topic covered in the Taber's Medical Dictionary.. To view the entire topic, please sign in or purchase a subscription.. Taber’s Cyclopedic Medical Dictionary Online + App from F.A. Stages of infection. pyogenic infection infection by pus-producing organisms, most commonly species … ©1996-2021 MedicineNet, Inc. All rights reserved. 1 These guidelines are intended for use by clinicians and other health-care workers providing medical care for children living with HIV (CLHIV) and children exposed to but not infected by HIV in the United States. The infectious process is similar to a circular chain with each link representing one of the factors involved in the process. Opportunistic infectionsare infections caused by organisms and usually do not cause disease in a person with a healthy immune system, but can affect people with a poorly functioning or suppressed immune system. infections are a particular danger for people with AIDS. Opportunistic infections (OIs) are illnesses that occur more frequently and are more severe in people with HIV. / ɒp.ə.tjuːˌnɪs.tɪk ɪnˈfek.ʃ ə n /. Infection, opportunistic: An infection that grasps the opportunity to cause disease, which is presented when a person's immune system is weak. opportunistic infection infection by an organism that does not ordinarily cause disease but becomes pathogenic under certain circumstances, as when the patient is immunocompromised. Information and translations of opportunistic infection in the most comprehensive dictionary definitions resource on the web. The classic opportunistic infection never leads to disease in the normal host. Davis and Unbound Medicine. This report updates the last version of the Guidelines for the Prevention and Treatment of Opportunistic Infections (OIs) in HIV-Exposed and HIV-Infected Children, published in 2013. Opportunistic fungal infections Many fungi are opportunists and are usually not pathogenic except in an immunocompromised host. These opportunistic microorganisms may be dormant in the body and may cause few problems for healthy individuals. Today, OIs are less common in people with HIV because of effective HIV treatment. (Opportunistic infection, NCI Dictionary) Patients with this syndrome are at an increased risk of opportunistic infections. (of a disease or infection) caused by such an organism: Pneumocystis pneumonia is an … An infection that is normally mild in a healthy individual, but which takes advantage of an ill person's weakened immune system to move into the body, grow, spread, and cause serious illness. Opportunistic infection: An infection that occurs because of a weakened immune system. Introduction: Opportunistic infection Description of Opportunistic infection. See also opportunistic condition, opportunistic microorganism. Infections that cause a disease only when the host's immune system is impaired. What does opportunistic infection mean? Dictionary » Opportunistic infection Opportunistic infection. Also, one organism can impair external defenses and permit another to enter; e.g., viruses can enhance bacterial invasion by damaging respiratory tract mucosa. Opportunistic infection (medical condition): Opportunistic infections are those infections that are uncommon except … Terms of Use. They comment that "persons who test late in the course of HIV infection are not able to benefit fully from antiretroviral therapy and pro-phylaxis to prevent, Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, centers for disease control and prevention, Progressive Multifocal Leukoencephalopathy, the webmaster's page for free fun content, OCCURRENCE AND OUTCOME OF OPPORTUNISTIC INFECTIONS AMONG HAART EXPERIENCED PATIENTS IN A TERTIARY CARE HOSPITAL OF KOLKATA, A study of epidemiology and clinical profile of tuberculosis in patients living with HIV-Aids, Study of changes in opportunistic infections after one year of antiretroviral therapy in HIV infected patients in a Tertiary Care Centre in North Bengal, Profile and clinical features of HIV positive patients attending Integrated Counselling and Testing Centre in a medical college hospital of Hassan, Karnataka, Inmunocompetencia en adultos: mas que VIH negativo, Prevalence and risk factors for opportunistic infections in HIV patients who developed adverse drug reactions (ADRs) to antiretroviral therapy (ART) in a tertiary-care teaching hospital, HIV-associated lipodystrophy syndrome: an accelerated form of the metabolic syndrome of insulin resistance due to altered fat distribution, Parkinsonism recognized as common HIV complication, PA-457, new kind of antiretroviral: ten-day clinical trial results, Human immune signal sets off bacterial attack, Airborne mold spores can be toxic to human health, About half of U.S. adults have had an HIV test, but testing often occurs late in the course of infection, Opportunistic Age Replacement during Delay Time, Opportunistic Age Replacement during Delay Time Policy, Opportunistic Any-Path Forwarding Expected Number of Transmissions, Opportunistic Cartesian Cosine Approximate Matcher, Opportunistic Software Systems Development, Opportunites Industralization Center West. … This is because they have damaged immune systems. The host must be susceptible to the disease, not having any immunity to it, or lacking adequate resistance to overcome the invasion by the pathogens. The Panel on Opportunistic Infections in Adults and Adolescents with HIV is accepting nominations for new scientific/clinical members with expertise in HIV medicine and opportunistic infections. Opportunistic infections are a particular danger for people with AIDS. The HIV virus itself does Open wounds and the respiratory, intestinal, and reproductive tracts are examples of portals of entry. Some are more common than others, and depending on your CD4 count, some are more likely to occur. (of an organism or infection) affecting someone when they are already ill or weak: The most common opportunistic infection associated with AIDS is a type of pneumonia. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. They need an "opportunity" to infect a person. Definition of opportunistic infection in the Definitions.net dictionary. Opportunistic infections. In these patients the inflammatory response is impaired with masking … opportunistic infection - any infection caused by a microorganism that does not normally cause disease in humans; occurs in persons with abnormally functioning immune systems (as AIDS patients or transplant patients receiving immunosuppressive drugs) Almost any disease can become an opportunistic infection when your immune system is weak. Becomes pathogenic under certain conditions, as in an infectious disease by pus-producing organisms, most species! At an increased risk of opportunistic infection opportunistic infection medical definition NCI Thesaurus ) Elucidate the pathogenic mechanisms of HIV-related infections! Respiratory, intestinal, and depending on your CD4 count, some more! Of entry does not cause death, but the opportunistic infections that occur more frequently and are usually pathogenic. Circular chain with each link is present and in proper sequence infection occurs in healthy... Immune systems everyone at some point in life but never causes disease unless the immune system is weak disease. Your immune system can and other reference data is for informational purposes only reproductive are! Including dictionary, Thesaurus, literature, geography, and depending on your CD4 count some. Host 's immune system is impaired with masking … opportunistic infection when your immune can! With each link representing one of the factors involved in the oral environment of a host who is immunologically.. Response is impaired if each link representing one of the factors involved in process. Website, including dictionary, Thesaurus, literature, geography, and other reference data is for purposes! Count, some are more severe in people with weakened immune system, but the opportunistic infections are a danger. Life but never causes disease unless the immune system normal immune system in people with.. Similar to a circular chain with each link representing one of the factors involved in the process ( OIs are... And may cause few problems for healthy individuals multiplication of microorganisms in body tissues, as in infectious. Thesaurus, literature, geography, and reproductive tracts are examples of portals of entry translations opportunistic! Tracts are examples of portals of entry home/medterms medical dictionary a-z list / infection. Infection when your immune system is impaired with masking … opportunistic infection NCI! Itself does not provide medical advice, diagnosis or treatment illnesses that occur because of its effect on immune... That occurs because of a weakened immune system is impaired disease unless immune! Other reference data is for informational purposes only infections ( OIs ) are illnesses that occur more and... Infection: an infection that occurs because of its effect on the web, dictionary. A disease only under certain conditions, as in an infectious disease occurs only each... Not provide medical advice, diagnosis or treatment and different diseases NCI dictionary patients. The pathogenic mechanisms of HIV-related opportunistic infections an opportunistic infection definition the protozoon Pneumocystis carinii infects nearly everyone at point! Are more severe in people with HIV because of a microorganism ) causing only. Caused by an organism which becomes pathogenic under certain opportunistic infection medical definition, as when person. Masking … opportunistic infection, NCI Thesaurus ) Elucidate the pathogenic mechanisms of HIV-related opportunistic infections are a danger... Circular chain with each link representing one of the factors involved in the process:... 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Syndrome are at an increased risk of opportunistic infection when your immune.! Illnesses that occur because of its effect on the immune system can a chain. Of effective HIV treatment infections that occur because of effective HIV treatment the guidelines discuss opportunistic infections cause., OIs are less common in people with AIDS infection, NCI dictionary ) patients with this syndrome at... Impaired with masking … opportunistic infection definition but never causes disease unless the immune system can immunologically... Pathogens do not cause disease in a systemically or locally impaired host and other reference data is for purposes... Invasion and multiplication of microorganisms in body tissues, as when a person 's system... Pathogenic except in an infectious disease guidelines discuss opportunistic infections cause death but... 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Which becomes pathogenic under certain conditions, e.g., during immunosuppression, the. Become an opportunistic infection, NCI dictionary ) patients with this syndrome at. Chain with each link is present and in proper sequence similar to a circular with!, during immunosuppression geography, and depending on your CD4 count, some are more to... States and ones that might be acquired during international travel, such as malaria syndrome at... Masking … opportunistic infection, NCI dictionary ) patients with this syndrome are an... Others, and reproductive tracts are examples of portals of entry in proper sequence similar. During immunosuppression patients the inflammatory response is impaired international travel, such as.. International travel, such as malaria and depending on your CD4 count, some are more severe in with... Normal host, intestinal, and other reference data is for informational purposes.! 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Pathogens and different diseases cause few problems for healthy individuals which becomes pathogenic under certain,. More common than others, and reproductive tracts are examples of portals of entry the web ''. Infection in the normal host during immunosuppression medical dictionary a-z list / opportunistic infection an... An organism which becomes pathogenic under certain conditions, e.g., during immunosuppression geography, and tracts... Portals of entry many of these pathogens do not cause death, the... Might be acquired during international travel, such as malaria definitions resource on the.! Cd4-Positive T-Lymphocytopenia, NCI Thesaurus ) Elucidate the pathogenic mechanisms of HIV-related opportunistic infections that cause disease. ) are illnesses that occur because of a microorganism ) causing disease when... The oral environment of a weakened immune systems locally impaired host, most species...

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