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Related Concept Videos

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...
Cholera01:25

Cholera

Cholera is an acute gastrointestinal disease caused by the Gram-negative bacterium Vibrio cholerae. It is transmitted primarily via the fecal-oral route through the ingestion of contaminated water or food.Vibrio cholerae is a motile, Gram-negative bacterium of the family Vibrionaceae, primarily associated with waterborne outbreaks in areas with inadequate sanitation. Although over 200 serogroups of V. cholerae exist, only O1 and O139 are responsible for epidemic cholera. The O1 serogroup,...
Bacterial Phylum Spirochaetes01:30

Bacterial Phylum Spirochaetes

Spirochetes, unique bacteria in the phylum Spirochaetes, are gram-negative, motile, tightly coiled, slender, and flexible. They inhabit aquatic sediments and animals, with some causing diseases like syphilis. Spirochetes are classified into eight genera based on habitat, pathogenicity, phylogeny, and characteristics.Their distinctive motility arises from endoflagella, located within the cell’s periplasm. These endoflagella anchor at the cell poles and extend along the cell length, encased by a...
Reservoir of Infection01:30

Reservoir of Infection

Infectious diseases arise from intricate interactions between pathogens and their reservoirs. A reservoir of infection refers to the natural habitat where a pathogen lives, grows, and multiplies, serving as a continual source of infection. Reservoirs are broadly classified as either living or nonliving, and each plays a unique role in disease transmission, significantly influencing public health interventions and control strategies.Humans act as reservoirs for a wide array of pathogens,...
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 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...

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Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection
12:30

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection

Published on: November 22, 2013

[Legionella, Legionnaires' disease].

Yvan Jamilloux1, Sophie Jarraud, Gérard Lina

  • 1Université de Lyon, centre national de référence des Legionella, IFR 128 université Lyon 1, Lyon, France.

Medecine Sciences : M/S
|July 19, 2012
PubMed
Summary

Legionnaires' disease diagnosis is faster using Legionella pneumophila urine antigen tests, improving patient outcomes. Enhanced surveillance of water systems aids community prevention of this severe pneumonia.

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Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
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Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

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Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection
12:30

Use of Galleria mellonella as a Model Organism to Study Legionella pneumophila Infection

Published on: November 22, 2013

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria
13:54

Tractable Mammalian Cell Infections with Protozoan-primed Bacteria

Published on: April 2, 2013

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Public Health

Context:

  • Legionnaires' disease, a severe pneumonia, is caused by Legionella bacteria.
  • Early diagnosis via Legionella pneumophila serogroup 1 urine antigen detection improves treatment and reduces mortality.
  • Surveillance of potable water systems is crucial for community prevention.

Purpose:

  • To summarize recent advances in Legionnaires' disease diagnosis, surveillance, and understanding of host-pathogen interactions.
  • To highlight the role of the National Reference Center for Legionella in France.
  • To underscore the importance of rapid diagnostics and preventative measures.

Summary:

  • Legionella pneumophila urine antigen tests enable quicker diagnosis and treatment of Legionnaires' disease, decreasing mortality rates.
  • The French National Reference Center for Legionella analyzes strains and associated data for epidemiological and genetic insights.
  • Recent research clarifies how L. pneumophila evades host defenses, offering targets for infection control.

Impact:

  • Accelerated diagnosis and treatment initiation for Legionnaires' disease.
  • Strengthened community prevention strategies through improved water system surveillance.
  • Enhanced understanding of host-pathogen interactions for future therapeutic development.