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Doctor insights on: Acute Hypersensitivity

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What is acute hypersensitivity pneumonitis?

What is acute hypersensitivity pneumonitis?

Inflammation in lung: Hypersensitivity pneumonitis is a lung disease in which an inhaled substance capable of triggering an immune response called and "antigen" is inhaled and causes an illness that is like pneumonia, with fever , shortness of breath etc.. Symptoms resolve when exposure to the antigen is stopped, but repetitive exposure can result in chronic scar formation in the lung. Steroid medicine can also help. ...Read more

Dr. Paul Carter
1,745 doctors shared insights

Hypersensitivity (Definition)

Hypersensitivity is a clinical term in which a normally tolerable trigger results in a larger than expected response. Examples include emotional responses to social situations, or sunburn from average amounts of sunlight that normally do ...Read more


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Acute hypersensitivity pneumonitis fatal?

Acute hypersensitivity pneumonitis fatal?

Not usually: Not usually, however very heavy exposure to the inciting agent or very severe responses can cause severe lung injury and result even in respiratory failure. Even in these situations if medical care is sought out the response to steroid medicine is usually very good. Repeat exposures that are untreated can cause a more chronic scarring of the lung or pulmonary fibrosis that can shorten ones life. ...Read more

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What does "acute pulmonary hypersensitivity reaction" mean? Is it something really serious?

What does "acute pulmonary hypersensitivity reaction" mean?  Is it something really serious?

Pulmonary hypersens: Drug side effect; happens when a patient takes nitrofurantoin/macrobid for a urinary infection. If a patient taking this medication starts to cough or get short of breath, they should stop the medication and be checked by a pulmonologist for this disorder. It can be very serious if not caught early. If caught right away, it will reverse. http://www.medsafe.govt.nz/profs/puarticles/nitrofurant.htm. ...Read more

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What are the symptoms of hypersensitivity to onions?

What are the symptoms of hypersensitivity to onions?

Typical symptoms: Regardless of the food triggering an allergic reaction the allergic reaction consists of some or all of these symptoms: itchy & swollen of lips, tongue, mouth, throat, nausea, vomiting, cramps, diarrhea, hives, swollen face, eyelids, coughing, wheezing, shortness of breath, a sense of doom, dizziness, loss of consciousness. ...Read more

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What are the common types of hypersensitivity reactions?

What are the common types of hypersensitivity reactions?

Many possibilities: The word "hypersensitivity" often is used to describe an allergic reaction. Possible causes of allergic reactions are sensitivities to foods, insects, medications, etc... ...Read more

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What is the difference between type I hypersensitivity and type ii?

What is the difference between type I hypersensitivity and type ii?

Big difference: Type 1 is mediated by the IgE antibody and responsible for anaphylaxis, hay fever, allerg etc. Allergy skin test can identify these. Type 2 is mediated by IgG or IgM antibody and complement proteins that are "cytotoxic" that ends up killing the target cell. Examples of this are hemolytic anemia, Graves disease, Myasthenia gravis, Rheumatic heart disease, etc. For anemia, a Coombs test is used ...Read more

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Help please? What is the difference between type i hypersensitivity to type ii?

Help please? What is the difference between type i hypersensitivity to type ii?

Type I is immediate: hypersensitivity reactions, involves IgE with histamine and other mediators release from mast cells, while type II is cytotoxic hypersensitivity reactions involving IgG or IgM bound to cell surface antigens, with subsequent complement (a protein in the blood) fixation, there are also type III and type IV reactions, type I reactions are responsible for immediate allergic symptoms to foods or drugs ...Read more