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Related Concept Videos

Hypersensitivities01:30

Hypersensitivities

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Hypersensitivity, also known as a hypersensitivity reaction or allergic reaction, is a condition where the body's immune system reacts abnormally to a foreign substance. Such substances, that cause hypersensitivity are referred to as an allergen, could be something typically harmless to most people, like pollen or certain foods.
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The treatment of pneumonia varies based on its severity and the causative pathogen. Here is a structured approach to managing pneumonia, integrating pharmaceutical and supportive care strategies.
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Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
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The pathophysiology of pneumonia involves the following steps:
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Allergic reactions related to drugs are hypersensitivity responses driven by the immune system and bear no connection to the drug's therapeutic action. While drugs in isolation do not trigger an immune response, they can interact with endogenous proteins to form antigens. These antigens stimulate lymphocytes to produce antibodies. IgE-type antibodies attach themselves to mast cells. Upon subsequent exposure to the same stimulus, the antigen-antibody interaction is initiated, unleashing...
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Pneumothorax is a medical condition defined by the buildup of air in the pleural space between the lungs and the chest wall. This accumulation of air can lead to partial or complete lung collapse, resulting in a range of clinical manifestations. Understanding the clinical presentation and effective management strategies is crucial for healthcare professionals in providing timely and appropriate care to individuals with pneumothorax.
Clinical Manifestations:
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Induction and Monitoring of Active Delayed Type Hypersensitivity DTH in Rats
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[Hypersensitivity Pneumonitis: An update].

P Chauvin1, M Kerjouan1, P Jégo2

  • 1Service de pneumologie, Hôpital Pontchaillou, Rennes, France.

La Revue De Medecine Interne
|May 4, 2021
PubMed
Summary
This summary is machine-generated.

Hypersensitivity Pneumonitis (HP) is an under-diagnosed lung disease caused by environmental exposures. Early recognition and antigen avoidance are crucial for managing HP and preventing fibrosis.

Keywords:
Alveolitis Extrinsic AllergicAlvéolite allergique extrinsèqueBird Fancier's LungDiagnosisDiagnosticExposition environnementaleFarmer's LungHypersensitivity PneumonitisInterstitialLung DiseasesMaladie des éleveurs d’oiseauxManagementPneumopathie d’hypersensibilitéPneumopathies interstitiellesPoumon du fermierTraitement

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Area of Science:

  • Pulmonology
  • Immunology
  • Radiology

Background:

  • Hypersensitivity Pneumonitis (HP) is an immune-mediated interstitial lung disease (ILD).
  • It results from repeated exposure to diverse environmental antigens in susceptible individuals.
  • HP is often under-diagnosed due to heterogeneous presentations and can represent up to 15% of ILDs.

Purpose of the Study:

  • To highlight the importance of recognizing Hypersensitivity Pneumonitis.
  • To emphasize the role of antigen identification and avoidance in HP management.
  • To outline diagnostic criteria and therapeutic strategies for HP.

Main Methods:

  • Diagnosis relies on clinical presentation, high-resolution computed tomography (HR-CT), and broncho-alveolar lavage (BAL) findings.
  • Typical HR-CT patterns combined with BAL lymphocytosis (>30%) suggest HP with confirmed exposure.
  • Further investigations, including histopathology and multidisciplinary discussion, are needed in ambiguous cases.

Main Results:

  • HP diagnosis is essential for appropriate patient management.
  • Antigenic eviction is the primary management strategy.
  • Corticosteroids are first-line for severe HP to prevent fibrosis.

Conclusions:

  • Prompt diagnosis and antigen removal are key to managing HP.
  • Corticosteroids and anti-fibrotic therapies offer treatment options for severe or progressive HP.