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Related Concept Videos

Asthma I: Introduction01:28

Asthma I: Introduction

Asthma is a chronic inflammatory disorder of the airways characterized by variable airflow obstruction and heightened bronchial responsiveness to a wide range of triggers. The underlying inflammation leads to airway swelling, mucus hypersecretion, and smooth muscle constriction, all of which narrow the airway lumen and impede airflow. Clinically, asthma presents with recurrent episodes of wheezing, shortness of breath, chest tightness, and coughing, symptoms that typically vary in intensity and...
Asthma III: Clinical Manifestations01:13

Asthma III: Clinical Manifestations

Asthma presents with a characteristic pattern of episodic respiratory symptoms that reflect underlying airway inflammation, bronchoconstriction, and mucus hypersecretion. Although severity varies among individuals, certain clinical manifestations are considered hallmarks of the disorder and often guide diagnosis and assessment.Respiratory SymptomsA persistent cough is one of the most common early features of asthma. It is frequently dry and tends to worsen at night or in the early morning,...
Asthma-I: Introduction01:29

Asthma-I: Introduction

Asthma is a chronic respiratory ailment that requires careful management due to its varying symptoms and influencing factors. It is characterized by airway inflammation, bronchial hyperresponsiveness, and reversible airflow obstruction, leading to symptoms like wheezing, shortness of breath, chest tightness, and coughing. The symptom frequency and intensity may vary considerably over time. It is also linked to immune system responses to allergens and irritants, highlighting the complex...
Asthma-III: Symptoms and Complications01:24

Asthma-III: Symptoms and Complications

Asthma, a common chronic respiratory condition, is classified considering the frequency and severity of symptoms alongside lung function impairment. Understanding this classification is essential for appropriate treatment and management. Here's a detailed look at the classification of asthma and its clinical features and complications:
Classification of Asthma
Asthma: Pathogenesis and Management01:20

Asthma: Pathogenesis and Management

Asthma is a chronic pulmonary condition involving inflammation of the airways, hyper-reactivity, and reversible obstruction of the airways. This condition can significantly impact a person's quality of life, making breathing difficult and leading to distressing symptoms.
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Asthma-IV: Diagnostic and Management01:30

Asthma-IV: Diagnostic and Management

The diagnosis and management of asthma are comprehensive, encompassing clinical assessments, lung function tests, and pharmacological interventions. Here's an overview:
Clinical Assessment for Asthma:
This is the first step in diagnosing and managing asthma. It includes:

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Related Experiment Video

Updated: Jun 3, 2026

Murine Model of Allergen Induced Asthma
08:05

Murine Model of Allergen Induced Asthma

Published on: May 14, 2012

[Baker's asthma. Experimental studies].

P Marraccini1

  • 1Centro di Allergologia Ambientale, Dipartimento di Medicina del Lavoro, Ospedale Maggiore Policlinico-Milano. paolo.marraccini@policlinico.mi.it

Giornale Italiano Di Medicina Del Lavoro Ed Ergonomia
|March 24, 2011
PubMed
Summary
This summary is machine-generated.

Baker's asthma, an occupational lung disease, is caused by flour dust. This dust is pro-inflammatory and can worsen existing allergic asthma by triggering non-allergic airway inflammation.

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Last Updated: Jun 3, 2026

Murine Model of Allergen Induced Asthma
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Published on: May 14, 2012

Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma
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Bronchial Thermoplasty: A Novel Therapeutic Approach to Severe Asthma

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Evaluation of Respiratory System Mechanics in Mice using the Forced Oscillation Technique
13:10

Evaluation of Respiratory System Mechanics in Mice using the Forced Oscillation Technique

Published on: May 15, 2013

Area of Science:

  • Occupational medicine
  • Pulmonary immunology
  • Toxicology

Context:

  • Baker's asthma is a prevalent occupational lung disease.
  • Characterized by rhinitis, bronchial hyperresponsiveness, and airflow obstruction.
  • A mouse model is needed to study its development and progression.

Purpose:

  • To investigate the inflammatory mechanisms of flour dust in the airways.
  • To determine if flour dust exacerbates pre-existing allergic asthma.

Summary:

  • Flour dust induces neutrophilic inflammation independently of toll-like receptor 4 (TLR4), indicating endotoxin is not the primary driver.
  • Bakery flour dust and its extracts significantly worsen established allergic asthma in a mouse model (OVA-sensitized and challenged).

Impact:

  • Bakery flour dust is a potent pro-inflammatory agent.
  • It can induce non-allergic airway inflammation.
  • It exacerbates allergen-mediated airway inflammation, highlighting risks for bakers.