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Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

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Bacterial meningitis typically begins when pathogens such as Neisseria meningitidis and Streptococcus pneumoniae colonize the nasopharynx and invade the bloodstream. This process is facilitated by bacterial virulence factors, such as polysaccharide capsules, which resist phagocytosis and complement-mediated killing. Less commonly, bacteria reach the central nervous system via contiguous spread from infections like otitis media or sinusitis, through congenital or acquired dural defects, or...
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Bacterial meningitis is a severe, life-threatening inflammation of the meninges, particularly the pia mater and arachnoid mater, affecting the subarachnoid space, ventricles, and cerebrospinal fluid (CSF). If untreated, it can lead to significant neurological complications or death.Causative AgentsCommon pathogens vary with age and immune status. In adults, major organisms include Streptococcus pneumoniae, Neisseria meningitidis, and Haemophilus influenzae. Streptococcus agalactiae (group B...
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Brain Abscess l: Introduction01:26

Brain Abscess l: Introduction

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A brain abscess is a focal, intracerebral infection characterized by a localized collection of pus within the brain parenchyma, resulting from microbial invasion and the body’s inflammatory response. It progresses through stages: early and late cerebritis, followed by early and late capsule formation, reflecting tissue destruction, immune response, and eventual encapsulation.Etiology and PathogenesisCausative organisms vary with source and host factors, often involving polymicrobial...
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Acute Pyelonephritis II: Diagnostic Studies and Management01:28

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Introduction:For diagnosing acute pyelonephritis, a comprehensive patient history is collected to identify symptoms such as dysuria, frequent or urgent urination, flank pain, or costovertebral angle (CVA) tenderness that may suggest a kidney infection.Physical ExaminationDuring the physical examination, CVA tenderness is assessed. This involves gentle percussion over the costovertebral angle, where tenderness often indicates a kidney infection.Diagnostic TestsUrinalysis: Used to identify white...
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Viral Meningitis

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Viral meningitis is the most common form of meningitis and is often referred to as aseptic meningitis to indicate the absence of bacterial involvement. It is generally milder than bacterial meningitis, with symptoms including fever, headache, stiff neck, drowsiness, nausea, photophobia, and vomiting. Rarely, more severe manifestations or death may occur. Common causative agents include enteroviruses, particularly coxsackie A and B viruses and echoviruses, all members of the Enterovirus genus...
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Procedures for Kidney StonesMedical intervention is necessary when kidney stones or renal calculi are too large to pass spontaneously (typically greater than 5 millimeters) when stones are accompanied by symptomatic infection (such as fever or pyelonephritis), when they impair kidney function, or when they cause persistent symptoms like severe pain, nausea, or urinary retention. Additionally, patients with only one kidney or those who cannot be treated with medical management also require...
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Updated: Apr 27, 2026

Knee Arthrocentesis in Adults
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Knee Arthrocentesis in Adults

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Septic bursitis in an 8-year-old boy.

Panagiotis Kratimenos1, Ioannis Koutroulis2, Dante Marconi3

  • 1Neonatal-Perinatal Medicine, St. Christopher's Hospital for Children, Drexel University College of Medicine, Philadelphia, PA, USA ; Department of Pediatrics, The Unterberg Children's Hospital at Monmouth Medical Center, Drexel University College of Medicine, Long Branch, NJ, USA.

Case Reports in Pediatrics
|June 24, 2014
PubMed
Summary

Prepatellar bursitis, rare in children, requires prompt diagnosis and treatment. Early intervention for this knee inflammation prevents severe complications like septic arthritis.

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Last Updated: Apr 27, 2026

Knee Arthrocentesis in Adults
04:41

Knee Arthrocentesis in Adults

Published on: February 25, 2022

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Area of Science:

  • Pediatric Orthopedics
  • Infectious Diseases
  • Rheumatology

Background:

  • Prepatellar bursitis, inflammation of the bursa near the kneecap, typically results from repetitive trauma.
  • This condition is exceptionally uncommon in pediatric patients.
  • Untreated prepatellar bursitis can lead to severe complications, including patellar osteomyelitis.

Purpose of the Study:

  • To present a case of prepatellar bursitis in an 8-year-old boy.
  • To highlight the differential diagnosis of tender, swollen knees in children.
  • To emphasize the importance of early diagnosis and management of pediatric prepatellar bursitis.

Main Methods:

  • Case report of an 8-year-old male presenting with knee pain, swelling, fever, and purulent drainage.
  • Evaluation included differential diagnosis of swollen knee conditions (infection, gout, rheumatoid arthritis, osteoarthritis).
  • Treatment involved wound culture and antibiotic therapy.

Main Results:

  • The patient presented with symptoms indicative of a severe knee infection.
  • Wound cultures identified Streptococcus pyogenes as the causative agent.
  • The infection resolved successfully with amoxicillin treatment.

Conclusions:

  • A high index of suspicion is crucial for diagnosing prepatellar bursitis in children.
  • Prompt recognition and treatment are essential to avert serious outcomes, such as septic arthritis.
  • This case underscores the rarity and potential severity of prepatellar bursitis in pediatric populations.