Related Experiment Video
Updated: Aug 7, 2026
11:32
Following in Real Time the Impact of Pneumococcal Virulence Factors in an Acute Mouse Pneumonia Model Using Bioluminescent Bacteria
Published on: February 23, 2014
[Pneumocystis jiroveci: a new name for an old pathogen]
J M Varela Aguilar1, F J Medrano Ortega, E Calderón Sandubete
1Servicio de Medicina Interna, Hospital Universitario Virgen del Rocío, Sevilla, España. varelajm@jazzfree.com
Revista Clinica Espanola
|June 10, 2006
Summary
Pneumocystis pneumonia (PCP) significantly impacts immunocompromised individuals. Molecular tools have advanced understanding of this fungal infection, now caused by Pneumocystis jirovecii.
Area of Science:
- Medical Mycology
- Infectious Diseases
- Immunology
Background:
- Pneumocystis pneumonia (PCP) is a severe opportunistic infection, particularly affecting individuals with human immunodeficiency virus (HIV) infection, organ transplant recipients, cancer patients, and those on immunosuppressive therapy.
- Historically, the inability to culture Pneumocystis in standard laboratory media has limited research into its transmission, acquisition, and sources.
- Recent advancements in molecular biology have significantly enhanced our comprehension of PCP's epidemiology, pathogen biology, and clinical characteristics.
Purpose of the Study:
- To review recent advancements in understanding human pneumocystosis.
- To highlight the impact of molecular tools on studying Pneumocystis infections.
- To discuss the updated taxonomy and nomenclature of the causative agent, Pneumocystis jirovecii.
Main Methods:
- Literature review focusing on recent studies utilizing molecular biology techniques.
- Analysis of epidemiological data and biological characteristics of Pneumocystis.
- Examination of taxonomic revisions for the human pathogen.
Main Results:
- Molecular tools have revolutionized the study of Pneumocystis, enabling deeper insights into its transmission and epidemiology.
- The causative agent of human pneumocystosis has been reclassified and is now known as Pneumocystis jirovecii.
- Significant progress has been made in understanding the biology and infection dynamics of this opportunistic pathogen.
Conclusions:
- Pneumocystis jirovecii is the primary cause of PCP in immunocompromised patients.
- Molecular diagnostics and research have been crucial in advancing the knowledge of human pneumocystosis.
- Continued research using advanced tools is essential for managing and preventing PCP effectively.
Related Concept Videos
01:29Pneumonia II: Pathophysiology
The pathophysiology of pneumonia involves the following steps:
01:30Pneumonia 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...
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...
01:29Pneumonia 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...
01:14Atypical 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...
01:20Chronic Obstructive Pulmonary Disease-II: Pathophysiology
Chronic Obstructive Pulmonary Disease (COPD) pathophysiology is intricate and multifaceted, involving a complex interplay of physiological processes. Understanding these mechanisms is crucial for effectively managing and treating COPD. Here is an in-depth look at the critical elements in the pathophysiology of COPD:
Chronic Inflammation
Chronic Inflammation
01:27Cryptococcal Meningitis
Cryptococcal meningitis is a life-threatening opportunistic infection predominantly associated with HIV/AIDS, accounting for over 100,000 deaths annually worldwide. However, it also affects individuals with other forms of immunosuppression, including those undergoing immunosuppressive therapy, organ transplant recipients, patients with innate immunodeficiencies, and individuals with hematological disorders. The infection is caused mainly by Cryptococcus neoformans and Cryptococcus gattii,...