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Related Concept Videos

Pneumonia I: Introduction01:30

Pneumonia I: Introduction

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.
Risk Factors
Various factors influence the likelihood of developing pneumonia. Age plays a crucial role, with infants, children under two, and individuals over 65 at increased risk due to their...
Pneumonia I: Introduction01:29

Pneumonia I: Introduction

Pneumonia is an infection of the lower respiratory tract that leads to inflammation of the lung parenchyma, often resulting in the accumulation of inflammatory exudate in the alveoli and airways. Unlike the watery, low-protein fluid exudate in pulmonary edema, the exudate in this case is a thick fluid rich in immune cells, proteins, and debris produced during infection and inflammation.This impairs gas exchange and can lead to consolidation of lung tissue. The infection may be caused by a...
Pneumonia II: Pathophysiology01:29

Pneumonia II: Pathophysiology

The pathophysiology of pneumonia involves the following steps:
Atypical Pneumonia01:14

Atypical Pneumonia

Atypical pneumonia, often caused by Mycoplasma pneumoniae, is a form of pulmonary infection that differs from the classical presentation of bacterial pneumonia in both its cause and clinical symptoms. Mycoplasma pneumoniae is a pleomorphic bacterium notable for its lack of a rigid cell wall. This structural characteristic imparts resistance to beta-lactam antibiotics and significantly influences the bacterium’s behavior within the human host.Other pathogens responsible for the disease include...
Fungal Phylum Ascomycota01:28

Fungal Phylum Ascomycota

Phylum Ascomycota, a major division within the subkingdom Dikarya, comprises a diverse range of fungal species, including both unicellular yeasts and filamentous molds such as Aspergillus and Penicillium. These fungi thrive in a variety of habitats, from aquatic ecosystems to terrestrial environments, playing crucial ecological and economic roles.Morphology and ReproductionThe defining characteristic of Ascomycetes, commonly referred to as sac fungi, is the ascus—a sac-like structure that...
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:

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Related Experiment Video

Updated: May 8, 2026

Histological Quantification to Determine Lung Fungal Burden in Experimental Aspergillosis
09:52

Histological Quantification to Determine Lung Fungal Burden in Experimental Aspergillosis

Published on: March 9, 2018

[Fungal pneumonias: do they exist?].

H Hof1

  • 1Labor Limbach, Heidelberg. herbert.hof@labor-limbach.de

Pneumologie (Stuttgart, Germany)
|September 6, 2013
PubMed
Summary

Fungal pneumonias, caused by opportunistic pathogens like Pneumocystis jirovecii, can affect immunocompromised individuals. Certain fungi also pose risks to healthy people, necessitating their consideration in severe pneumonia cases unresponsive to antibiotics.

Area of Science:

  • Mycology
  • Infectious Diseases
  • Pulmonology

Context:

  • Fungal infections, particularly fungal pneumonia, are often opportunistic, primarily affecting immunocompromised hosts.
  • Pathogens such as Pneumocystis jirovecii, Coccidioides immitis, and Cryptococcus neoformans can cause severe respiratory illness.
  • Current German guidelines for community-acquired pneumonia (CAP) and nosocomial pneumonia inadequately address fungal etiologies.

Purpose:

  • To highlight the underrepresentation of fungal pathogens in current German pneumonia guidelines.
  • To emphasize the importance of considering fungal infections in the differential diagnosis of severe pneumonia.
  • To advocate for the inclusion of fungi in diagnostic considerations for pneumonia, especially in non-responsive cases.

Summary:

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Last Updated: May 8, 2026

Histological Quantification to Determine Lung Fungal Burden in Experimental Aspergillosis
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Efficient Method for Imaging Murine Lungs that Preserves Spatial Dynamics of Fungal Spores in the Airways
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  • Fungi are recognized opportunistic pathogens, with some species like Pneumocystis jirovecii predominantly infecting immunocompromised individuals.
  • However, fungi such as Coccidioides immitis and Cryptococcus neoformans can also infect otherwise healthy individuals.
  • German guidelines for community-acquired pneumonia do not mention fungi, and nosocomial pneumonia guidelines only briefly discuss Aspergillus spp. and Candida spp.

    • Impact:

    • Inclusion of fungal pathogens in differential diagnosis for severe CAP, especially in patients with comorbidities unresponsive to antibacterial therapy.
    • Potential revision of clinical guidelines to incorporate a broader range of fungal pneumonia etiologies.
    • Improved patient outcomes through timely and accurate diagnosis and treatment of fungal pneumonias.