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Related Concept Videos

Pneumonia I: Introduction01:29

Pneumonia I: Introduction

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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...
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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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The human respiratory tract, comprising the upper and lower segments, serves as a critical interface with the external environment. The upper respiratory tract (URT)—including the nostrils, sinuses, pharynx, and oropharynx—is heavily colonized by microbes, while the lower respiratory tract (LRT), composed of the larynx, trachea, bronchi, and lungs, was long thought to be sterile. However, recent molecular studies have revealed that the lungs are not devoid of microbes but act more...
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In terms of human respiration, the act of expelling air, known as exhalation (or expiration), operates on the principle of pressure gradients. During expiration, the pressure within the lungs exceeds that of the surrounding atmosphere. Under normal conditions, quiet breathing involves passive exhalation and is free of muscular contractions. This is because the exhalation process is driven by the natural elastic recoil of the lungs and chest wall, both of which have an inherent tendency to...
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Influenza01:27

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Influenza is an acute, highly communicable viral disease that affects the respiratory tract and is responsible for seasonal epidemics worldwide. Influenza A is the most prevalent type associated with widespread outbreaks and is subtyped based on two surface glycoproteins: hemagglutinin (H) and neuraminidase (N), as in H1N1. These glycoproteins are essential for viral infectivity, transmission, and immune recognition. Transmission occurs primarily through respiratory droplets and contaminated...
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Related Experiment Video

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An In vitro Model to Study Immune Responses of Human Peripheral Blood Mononuclear Cells to Human Respiratory Syncytial Virus Infection
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Rhinovirus and the developing lung.

D W Cox1, P N Le Souëf2

  • 1School of Paediatrics and Child Health, University of Western Australia, Perth, WA, Australia; Respiratory Department, Our Lady's Children's Hospital, Crumlin, Dublin 12, Ireland.

Paediatric Respiratory Reviews
|April 29, 2014
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Summary
This summary is machine-generated.

Human rhinovirus (HRV) is the most frequent cause of childhood respiratory illnesses. This review explores the connection between HRV infections and long-term lower airway disorders in children.

Keywords:
Rhinoviruschildrenrespiratory illnesses

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Area of Science:

  • Pediatrics
  • Infectious Diseases
  • Respiratory Medicine

Background:

  • Human rhinovirus (HRV) is the most common cause of acute respiratory illnesses (ARIs) in children.
  • Advanced PCR techniques confirm HRV as a primary agent in childhood ARIs like bronchiolitis, asthma, pneumonia, and croup.

Purpose of the Study:

  • To review the relationship between HRV infections and childhood lower airway disorders.
  • To investigate the less understood long-term implications of HRV infections.

Main Methods:

  • Literature review of studies on HRV and childhood respiratory conditions.
  • Analysis of PCR-confirmed HRV cases and associated lower airway diseases.

Main Results:

  • HRV identified as a leading cause of various ARIs in children.
  • Evidence suggests a potential link between HRV and persistent lower airway issues, though long-term effects require further study.

Conclusions:

  • HRV is a significant pathogen in pediatric respiratory infections.
  • Further research is needed to fully elucidate the long-term consequences of HRV on children's lower airways.