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Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

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The pathophysiology of pneumonia involves the following steps:
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Pneumonia I: Introduction01:30

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Pneumonia is an acute respiratory infection that targets the lungs, specifically the alveoli. These tiny air sacs, essential for oxygen exchange, become engorged with pus and fluid, severely hindering breathing, decreasing oxygen absorption, and causing significant pain and discomfort during respiration.
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Chronic obstructive pulmonary disease (COPD) is a group of lung conditions that progressively worsen over time, including chronic bronchitis and emphysema. This cluster of diseases collectively leads to a gradual and irreversible decline in lung function over time.
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Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:
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Pulmonary Tuberculosis II01:28

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Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
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Other Pulmonary Disorders01:17

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Respiratory disorders encompass a range of conditions with varying levels of severity. Asthma, marked by chronic airway inflammation and hypersensitivity, is one such condition. It can lead to airway obstruction due to factors like bronchial spasms, mucosal edema, increased mucus secretion, or epithelial damage. Asthma triggers are diverse, ranging from allergens to emotional upset, and treatment focuses on both immediate relief through bronchodilators and long-term inflammation suppression.
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Related Experiment Video

Updated: Aug 9, 2025

Detection of Invasive Pulmonary Aspergillosis in Haematological Malignancy Patients by using Lateral-flow Technology
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Invasive Pulmonary Aspergillosis in Patients with and without SARS-CoV-2 Infection.

Jesús Fortún1,2,3,4, María Mateos5, Elia Gómez-García de la Pedrosa2,3,6

  • 1Infectious Diseases Department, Hospital Ramón y Cajal, 28034 Madrid, Spain.

Journal of Fungi (Basel, Switzerland)
|February 25, 2023
PubMed
Summary

Isolation of Aspergillus in respiratory samples, even without disease criteria, is linked to high mortality, particularly in COVID-19 patients. Early treatment initiation is suggested due to the significant mortality risk associated with Aspergillus infections.

Keywords:
CAPASARS-CoV-2aspergillosiscolonizationthrombocytopenia

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Area of Science:

  • Medical Mycology
  • Infectious Diseases
  • Pulmonology

Background:

  • The European Confederation of Medical Mycology (ECMM) and International Society for Human and Animal Mycology (ISHAM) 2020 classification aids in defining COVID-19-associated invasive pulmonary aspergillosis (CAPA).
  • Differentiating invasive pulmonary aspergillosis (IPA) from colonization is challenging in severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) patients due to low specificity of radiological findings.

Purpose of the Study:

  • To evaluate the clinical significance and mortality associated with Aspergillus isolation in respiratory samples.
  • To assess the impact of SARS-CoV-2 infection on mortality in patients with Aspergillus colonization or IPA.

Main Methods:

  • A retrospective, unicenter study of 240 patients with Aspergillus isolates in respiratory samples over 20 months.
  • Categorization into 140 IPA cases and 100 colonization cases.
  • Multivariate analysis to identify independent predictors of mortality.

Main Results:

  • High mortality rates were observed in both IPA (37.1%) and colonization (34.0%) groups.
  • Mortality was significantly higher in SARS-CoV-2 patients with Aspergillus colonization (66.6%) compared to non-colonized patients (40.7%).
  • Independent mortality predictors included age > 65, renal failure, thrombocytopenia, inotrope requirement, and SARS-CoV-2 infection, but not IPA presence.

Conclusions:

  • Isolation of Aspergillus spp. in respiratory samples, regardless of disease criteria, is associated with high mortality, especially in SARS-CoV-2 patients.
  • The findings suggest that early treatment initiation for Aspergillus is crucial due to the high mortality rate.