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Related Concept Videos

Bacterial Meningitis01:24

Bacterial Meningitis

Bacterial meningitis is a severe infectious disease involving inflammation of the meninges, the protective membranes surrounding the brain and spinal cord. It occurs when pathogenic bacteria cross the blood–brain barrier and enter the cerebrospinal fluid. Common causative organisms include Neisseria meningitidis, Streptococcus pneumoniae, Haemophilus influenzae type b, Listeria monocytogenes, and Escherichia coli K1. The exact route of entry varies by pathogen and host condition.Routes of Entry...
Bacterial Meningitis I: Introduction01:22

Bacterial Meningitis I: Introduction

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...
Bacterial Meningitis II: Pathophysiology01:26

Bacterial Meningitis II: Pathophysiology

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...
Acute Pyelonephritis II: Diagnostic Studies and Management01:28

Acute Pyelonephritis II: Diagnostic Studies and Management

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...
Determinants of Bacterial Pathogenicity and Virulence01:20

Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
Pneumonia III: Complications and Assessment01:30

Pneumonia III: Complications and Assessment

Pneumonia poses the potential for numerous complications that warrant consideration. These complications include the following:

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Related Experiment Video

Updated: Jun 4, 2026

Design of Cecal Ligation and Puncture and Intranasal Infection Dual Model of Sepsis-Induced Immunosuppression
07:30

Design of Cecal Ligation and Puncture and Intranasal Infection Dual Model of Sepsis-Induced Immunosuppression

Published on: June 15, 2019

[Bacteraemia and sepsis].

W V Kern1

  • 1Zentrum Infektiologie und Reisemedizin, Medizinische Universitätsklinik. 79106 Freiburg. kern@if-freiburg.de

Deutsche Medizinische Wochenschrift (1946)
|January 29, 2011
PubMed
Summary
This summary is machine-generated.

Selective intestinal decontamination for ventilated patients is debated due to resistance concerns. Procalcitonin aids antibiotic duration decisions, while rising ESBL E. coli and MRSA bloodstream infections increase mortality risks.

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Design of Cecal Ligation and Puncture and Intranasal Infection Dual Model of Sepsis-Induced Immunosuppression
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Direct Microbial Identification using An Automated Microbial Identification System to Facilitate the EUCAST RAST Method Without Mass Spectrometry
09:07

Direct Microbial Identification using An Automated Microbial Identification System to Facilitate the EUCAST RAST Method Without Mass Spectrometry

Published on: May 24, 2024

Area of Science:

  • Infectious Diseases
  • Critical Care Medicine
  • Clinical Microbiology

Background:

  • Recent German sepsis guidelines recommend selective intestinal decontamination for ventilated patients to prevent secondary infections.
  • This recommendation is controversial due to potential for increased antimicrobial resistance and limited effect size.
  • Procalcitonin is a valuable biomarker for guiding antibiotic treatment duration in various infections.

Purpose of the Study:

  • To review recent developments in bloodstream infection and sepsis management relevant to clinical practice.
  • To highlight the utility of procalcitonin in optimizing antibiotic therapy duration.
  • To discuss the evolving epidemiology of bloodstream infections, particularly concerning resistant pathogens.

Main Methods:

  • Review of recent clinical news and guideline recommendations.
  • Analysis of data on procalcitonin's role in antibiotic stewardship.
  • Epidemiological surveillance data on common bloodstream pathogens and resistance patterns.

Main Results:

  • Selective intestinal decontamination remains controversial despite guideline recommendations.
  • Procalcitonin-based algorithms can safely shorten antibiotic duration in critical care.
  • Escherichia coli and Staphylococcus aureus are leading causes of bloodstream infections, with increasing prevalence of ESBL-producing E. coli.
  • Infections with ESBL-producing E. coli and methicillin-resistant Staphylococcus aureus (MRSA) are associated with higher mortality.
  • MRSA bacteremia incidence in Germany is now better tracked due to mandatory reporting.

Conclusions:

  • Procalcitonin offers a reliable method for de-escalating antibiotic therapy, improving outcomes and potentially reducing resistance.
  • The rise of multidrug-resistant organisms like ESBL-producing E. coli and MRSA necessitates vigilant surveillance and management strategies.
  • Further research is needed to clarify the role and risks of selective intestinal decontamination in specific patient populations.