Related Experiment Video
Updated: May 23, 2026
15:43
Long Term Chronic Pseudomonas aeruginosa Airway Infection in Mice
Published on: March 17, 2014
Lymphadenitis caused by Aerococcus urinae infection.
R Santos1, E Santos, S Gonçalves
1Laboratório de Análises, Instituto Superior Técnico, Hospital de Egas Moniz, Lisboa, Portugal. pcricard@popsrv.ist.utl.pt
Scandinavian Journal of Infectious Diseases
|July 24, 2003
Summary
Aerococcus urinae, a rare pathogen, can cause severe human infections beyond urinary tract infections. This case highlights A. urinae as a cause of lymphadenitis, expanding its known clinical spectrum.
Area of Science:
- Microbiology
- Infectious Diseases
- Clinical Medicine
Background:
- Aerococcus urinae is a gram-positive coccus with poorly understood pathogenesis.
- While known to cause urinary tract infections, its role as a human pathogen is infrequently reported.
- Severe infections like endocarditis and septicaemia have been linked to A. urinae.
Observation:
- This paper details a rare case of human lymphadenitis.
- The lymphadenitis was attributed to infection by Aerococcus urinae.
Findings:
- Aerococcus urinae can manifest as a cause of lymphadenitis in humans.
- This finding expands the spectrum of clinical presentations associated with A. urinae infections.
Implications:
- Further research into A. urinae pathogenesis is warranted.
- Clinicians should consider A. urinae in the differential diagnosis of lymphadenitis, particularly in patients with urinary tract issues.
- This case underscores the importance of recognizing A. urinae as a potential cause of serious infections.
Related Concept Videos
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...
01:26Urinary Tract Infection I: Introduction
Urinary tract infections (UTIs) impact various parts of the urinary system, including the kidneys, ureters, bladder, and urethra. These infections are generally bacterial, with Escherichia coli being the most common causative agent, often originating from the gastrointestinal tract. However, other bacteria, such as Staphylococcus saprophyticus, Klebsiella pneumoniae, and Proteus mirabilis, are also known to cause UTIs. The type, location, and underlying complexity of the UTI guide both...
01:25Urinary Tract Infection II: Pathophysiology
The pathophysiology of urinary tract infections (UTIs) encompasses several progressive stages, beginning with bacterial colonization and culminating in potential systemic complications if untreated. UTIs are primarily initiated by bacteria, such as Escherichia coli, which often originate from the gastrointestinal tract and migrate to the urinary system through the periurethral area. This migration can occur via several routes, including improper hygiene practices, sexual activity, or...
01:27Acute Pyelonephritis I: Introduction
Pyelonephritis is a bacterial infection that primarily affects the renal parenchyma and collecting system, including the renal pelvis, tubules, and interstitial tissue of one or both kidneys. It can be classified as either acute—a sudden, severe infection—or chronic, which refers to long-term or recurrent kidney infections.The primary cause of acute pyelonephritis (APN) is bacterial infection, with Escherichia coli accounting for approximately 70-80% of cases. Other bacteria, such as Proteus,...
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...
01:29Pneumonia 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...