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Related Concept Videos

Atypical Pneumonia01:14

Atypical Pneumonia

88
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...
88
Pneumonia I: Introduction01:30

Pneumonia I: Introduction

1.5K
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...
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Pneumonia I: Introduction01:29

Pneumonia I: Introduction

58
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...
58
Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features01:24

Chronic Obstructive Pulmonary Disease III: Chronic Bronchitis Features

77
Chronic bronchitis is a key phenotype of chronic obstructive pulmonary disease (COPD), characterized by airway-centered inflammation and mucus overproduction. It develops from long-term exposure to harmful particles or gases, most commonly cigarette smoke, which triggers a persistent inflammatory response.Cellular and Structural ChangesInflammation initially affects the large bronchi and later the smaller airways, with infiltration by immune cells, including neutrophils, macrophages, and...
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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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Related Experiment Video

Updated: May 6, 2026

Murine Oropharyngeal Aspiration Model of Ventilator-associated and Hospital-acquired Bacterial Pneumonia
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[Mycoplasma-pneumoniae-associated mucositis].

Alinda G Vos1, Michèle H J Goossens, Steven F T Thijsen

  • 1Diakonessenhuis, Utrecht.

Nederlands Tijdschrift Voor Geneeskunde
|October 17, 2013
PubMed
Summary

Mycoplasma pneumoniae infections can cause severe mucositis, stomatitis, conjunctivitis, and urethritis, even without significant skin issues. Prompt antibiotic treatment leads to rapid recovery.

Area of Science:

  • Infectious Diseases
  • Dermatology
  • Ophthalmology
  • Urology

Background:

  • Mycoplasma pneumoniae commonly causes respiratory infections, particularly in adolescents.
  • Extrapulmonary manifestations, such as Mycoplasma pneumoniae associated mucositis (MPAM), are less recognized.
  • MPAM involves inflammation of mucous membranes and can present with diverse symptoms.

Observation:

  • A 19-year-old male presented with severe mucositis, stomatitis, conjunctivitis, urethritis, and mild exanthema.
  • Initial symptoms included cough and fever.
  • Diagnostic tests confirmed Mycoplasma pneumoniae infection via IgM titre and PCR.

Findings:

  • The patient's symptoms resolved rapidly following doxycycline treatment.

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  • Mucosal lesions healed within two weeks.
  • Mycoplasma pneumoniae infection can manifest as a triad of stomatitis, conjunctivitis, and urethritis.

    • Implications:

    • Recognizing MPAM is crucial for timely diagnosis and treatment.
    • This triad presentation can occur with minimal cutaneous involvement.
    • Early intervention with antibiotics like doxycycline improves patient outcomes.