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Asthma I: Introduction

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-I: Introduction

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-II: Pathophysiology and Classification

Asthma-II: Pathophysiology and Classification

Asthma is a prevalent chronic respiratory condition marked by inflammation and hyperresponsiveness of the airways. Its pathophysiology involves complex interactions among inflammatory pathways, immune responses, and neural mechanisms.
Additionally, environmental and genetic factors play crucial roles in determining an individual's susceptibility to asthma and the severity of their condition.
Critical processes in asthma pathophysiology include:

Asthma: Pathogenesis and Management

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-III: Symptoms and Complications

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 III: Clinical Manifestations

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,...

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Related Experiment Video

Updated: Jul 18, 2026

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

Published on: June 4, 2017

Thunderstorm-asthma and pollen allergy.

G D'Amato¹, G Liccardi, G Frenguelli

¹Division of Pneumology and Allergology, Department of Respiratory Diseases, High Speciality Hospital A. Cardarelli, Napoli, Italy.

|December 13, 2006

Summary

Thunderstorm asthma outbreaks occur during pollen season when ruptured pollen grains release allergens. Individuals with pollen allergies, even without asthma, are at risk of severe reactions.

Area of Science:

Environmental Health
Allergology
Meteorology

Background:

Thunderstorms have been associated with asthma epidemics, particularly during pollen seasons in various global cities.
Pollen grains, when ruptured by thunderstorm conditions, release allergenic aerosols that can penetrate deep into the lower airways.
These events can trigger asthma attacks, even in individuals without pre-existing asthma but with seasonal allergic rhinitis.

Purpose of the Study:

To investigate the link between thunderstorms, pollen, and asthma outbreaks.
To understand the mechanism by which thunderstorm-related pollen exposure exacerbates asthma symptoms.
To inform at-risk populations about potential triggers during pollen seasons.

Main Methods:

Analysis of historical asthma outbreak data in relation to thunderstorm events and pollen concentrations.

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Last Updated: Jul 18, 2026

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

A Component-resolved Diagnostic Approach for a Study on Grass Pollen Allergens in Chinese Southerners with Allergic Rhinitis and/or Asthma

Published on: June 4, 2017

Flow Cytometric Analysis of Particle-bound Bet v 1 Allergen in PM10

Flow Cytometric Analysis of Particle-bound Bet v 1 Allergen in PM10

Published on: November 19, 2016

Examination of the physical and chemical properties of pollen grains under simulated thunderstorm conditions.

Review of clinical data from emergency department visits during identified events.

Main Results:

Thunderstorm-associated asthma outbreaks show a rapid increase in emergency visits at the onset of storms.
High atmospheric pollen concentrations, especially from grasses, were strongly correlated with these outbreaks.
No significant air pollution levels were noted, indicating pollen as the primary trigger.

Conclusions:

Thunderstorm-induced pollen rupture is a significant factor in asthma epidemics.
Individuals with pollen allergies are at increased risk of asthma attacks during thunderstorms.
Public health awareness regarding this phenomenon is crucial for prevention and management.