what is hypersensitivity pneumonitis
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hypersensitivity pneumonitis inflammation of the lung; see also pneumonia. hypersensitivity pneumonitis a respiratory hypersensitivity reaction to repeated inhalation of organic particles, usually in an occupational setting, with onset a few hours after exposure to the allergen.
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- Comment in J Gen Physiol. 2005 Jun;125(6):529-30. Increased resistance of the small blood vessels within the lungs is associated with pulmonary hypertension and results from a decrease in size induced by the contraction of their smooth muscle cells (SMCs).omment in J Gen Physiol. 2005 Jun;125(6):529-30. Increased resistance of the small blood vessels within the lungs is associated with pulmonary hypertension and results from a decrease in size induced by the contraction of their smooth muscle cells (SMCs).
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- Hypersensitivity is a term that is used to identify situations in which some type of substance or medication triggers an unusually strong and adverse reaction from the immune system.
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Hypersensitivity to Wood Dust Reports in the literature have suggested that inhalation exposure to wood dust may lead to the development of reversible bronchial obstructive disease resembling asthma.7 8 9 10 11 Our studies indicate that the response to wood dust may be a hypersensitivity reaction and present clinically as at least two different patterns (Table 2).
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Hypersensitivity reactions associated with endovascular devices Hypersensitivity reactions to the biomaterials used in endovascular prostheses are among the infrequent reactions that may lead to local or systemic complications following cardiovascular therapeutic interventions. In the discussion of metal sensitivity and metal-containing implants, two different entities should be considered:
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- Hypersensitivity pneumonitis refers to an inflammation of the lungs caused by repeated breathing in of a foreign substance, such an organic dust, a fungus, or a mold.
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- Definition. Pneumonitis (noo-moe-NIE-tis) is a general term that refers to inflammation of lung tissue. Although pneumonia is technically a type of pneumonitis because the infection causes inflammation, most doctors are referring to other causes of lung inflammation when they use the term pneumonitis..Factors that can cause pneumonitis include exposure to airborne irritants at your job or from your hobbies.In addition, some types of cancer treatments and dozens of drugs can cause pneumonitis. Difficulty breathing — often accompanied by a dry (nonproductive) cough — is the most common symptom of pneumonitis.actors that can cause pneumonitis include exposure to airborne irritants at your job or from your hobbies. In addition, some types of cancer treatments and dozens of drugs can cause pneumonitis. Difficulty breathing — often accompanied by a dry (nonproductive) cough — is the most common symptom of pneumonitis.
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- Diseases associated with inhalation of fungal spores can include toxic pneumonitis, hypersensitivity pneumonitis, tremors, chronic fatigue syndrome, kidney failure, and cancer. Exposure to molds has become a significant health risk to an increasing number of workers in various occupations throughout the nations. Fungal antigens are able to cause occupational asthma, rhinoconjunctivitis, hypersensitivity pneumonitis and organic dust toxic syndrome (ODTS).
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Medical Definition of Hypersensitivity pneumonitis Hypersensitivity pneumonitis: a type of inflammation of the lung that develops from breathing in a foreign substance. Molds (fungi) or dust are the most common substances that cause this reaction. Symptoms vary according to severity and can include shortness of breath, coughing, and fever, and chills.
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- Definition. Hypersensitivity pneumonitis, also known as hypersensitivity pneumonia and extrinsic allergic alveolitis, is a form of interstitial lung disease characterized by an immunologically mediated inflammatory response (hypersensitivity reaction) to inhaled organic antigens in susceptible individuals.
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Immediate Hypersensitivity Reactions Background. The immune system is an integral part of human protection against disease, but the normally protective immune mechanisms can sometimes cause detrimental reactions in the host. Such reactions are known as hypersensitivity reactions, and the study of these is termed immunopathology.ackground. The immune system is an integral part of human protection against disease, but the normally protective immune mechanisms can sometimes cause detrimental reactions in the host. Such reactions are known as hypersensitivity reactions, and the study of these is termed immunopathology.
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16 Warning Signs of Poor Blood Circulation 2. Talk to your doctor. If you have repeated problems with leg cramps, if you are elderly, have diabetes or liver disease, nerve compression caused by problems in your lower back, poor circulation in your legs, or thyroid disease, you may be at greater risk of developing leg cramps.
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Hypersensitivity Hypersensitivity (also called hypersensitivity reaction or intolerance) is a set of undesirable reactions produced by the normal immune system, including allergies and autoimmunity. These reactions may be damaging, uncomfortable, or occasionally fatal.Hypersensitivity reactions require a pre-sensitized (immune) state of the host. They are classified in four groups after the proposal of P. G. H. Gell and Robin Coombs in 1963.hese reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. They are classified in four groups after the proposal of P. G. H. Gell and Robin Coombs in 1963.
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- In a retrospective study of 37 patients with suspected immediate hypersensitivity reaction to iodinated contrast media (ICM), the negative predictive value for skin tests and intravenous provocation test (IPT) with low dose ICM was 80% (95% CI 44-97%).
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Top 30 Doctor insights on: Visceral Hypersensitivity Treatment Visceral hypersensitivity treatment - What is the treatment for hypersensitivity pneumonitis? Depends. Number one is removal of the precipitating allergen (cause of the hypersensitivity). Then, depending upon the severity, short courses of anti-inflammatory meds which may include steroids may be helpful.
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Clinical ReviewVisceral hypersensitivity in functional disorders of the upper gastrointestinal tract Abstract. Visceral hypersensitivity is now recognised as a major pathophysiological mechanism in functional gastrointestinal disorders of the upper gastrointestinal tract. In patients with non-cardiac chest pain and functional dyspepsia, a high prevalence of visceral hypersensitivity has been indeed observed.
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Hypersensitivity They are usually referred to as an over- reaction of the immune system and these reactions may be damaging, uncomfortable, or occasionally fatal. Hypersensitivity reactions require a pre-sensitized (immune) state of the host. They are classified in four groups after the proposal of P. G. H. Gell and Robin Coombs in 1963.
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hypersensitivity contact hypersensitivity a type IV hypersensitivity produced by contact of the skin with a chemical substance having the properties of an antigen or hapten.
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hypersensitivity pneumonitis hypersensitivity pneumonitis. Hypersensitivity pneumonitis refers to an inflammation of the lungs caused by repeated breathing in of a foreign substance, such an organic dust, a fungus, or a mold.
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hypersensitivity Type III (called also immune-complex or subacute hypersensitivity) causes tissue damage and inflammation by the deposition of antigen-antibody complexes that activate complement and attract polymorphonuclear cells.ypersensitivity, immediate, n a humoral reaction, mediated by the circulating B lymphocytes, which causes any of three immediate responses: anaphylactic hypersensitivity, cytotoxic hypersensitivity, and immune system hypersensitivity.
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Chemical pneumonitis Chronic chemical pneumonitis can occur after only low levels of exposure to the irritant over a long time. This causes inflammation and may lead to stiffness of the lungs. As a result, the lungs start to lose their ability to get oxygen to the body. Untreated, this condition can cause respiratory failure and death.
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Anaphylaxis Anaphylaxis is a type I hypersensitivity reaction. Asthma is another example of a type I reaction, but, whereas asthma is localized to the respiratory region of the body, anaphylaxis has effects throughout the organism. In all type I allergic reactions, sensitization occurs when a substance triggers the immune system to recognize it as a threat to the body.
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Hypersensitivity Reactions Hypersensitivity can be defined as a normal but exaggerated or uncontrolled immune response to an antigen that can produce inflammation, cell destruction, or tissue injury. Our basic understanding of allergy has evolved from the discovery in 1967 of a previously unknown antibody, immunoglobulin E (IgE).