Related Experiment Video
Updated: Jul 12, 2026
05:55
Induction of Leptomeningeal Cells Modification Via Intracisternal Injection
Published on: May 7, 2020
[Expression of inflammatory mediators in meningitis]
Raymond Farah1, Ludmila Freidzon, Shifra Sela
1Department of Internal Medicine F, Western Galilee Hospital, Nahariya, Israel. Raymond.Farah@naharia.health.gov.il
Harefuah
|September 1, 2007
Summary
Interleukin-6 (IL-6) in blood can differentiate bacterial from viral meningitis. Cerebrospinal fluid (CSF) cytokine levels further distinguish between bacterial, viral meningitis, and non-infectious neurological diseases.
Area of Science:
- Neurology
- Immunology
- Infectious Diseases
Background:
- Infectious diseases trigger systemic inflammation, complicating meningitis diagnosis.
- Differentiating bacterial, viral, and non-infectious meningitis is crucial for prognosis and treatment.
- Inflammatory markers aid in assessing disease severity and predicting clinical outcomes.
Purpose of the Study:
- To evaluate if specific inflammatory markers can distinguish between bacterial meningitis, viral meningitis, and non-infectious neurological diseases.
- To assess the diagnostic utility of blood and cerebrospinal fluid (CSF) inflammatory markers.
Main Methods:
- Studied patients with bacterial meningitis (n=8), viral meningitis (n=17), non-infectious neurological diseases (n=17), and healthy controls (n=15).
- Measured serum levels of soluble CD14 (sCD14), interleukin-6 (IL-6), interleukin-1beta (IL-1beta), and soluble adhesion molecule-1 (sICAM-1).
- Analyzed CSF levels of these markers in patients undergoing lumbar puncture.
Main Results:
- All patient groups showed significant differences in blood and CSF markers compared to healthy subjects.
- Blood IL-6 levels were significantly different between bacterial and viral meningitis groups.
- CSF cytokine levels demonstrated significant differences across all patient groups (bacterial meningitis, viral meningitis, non-infectious diseases).
Conclusions:
- Blood IL-6 levels can differentiate bacterial from viral meningitis.
- CSF cytokine profiles effectively distinguish between bacterial meningitis, viral meningitis, and non-infectious neurological conditions.
- Inflammatory marker analysis, particularly in CSF, offers valuable diagnostic insights for meningitis.
Related Concept Videos
01:24Bacterial 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...
01:26Bacterial 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...
01:22Bacterial 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...
01:18Viral Meningitis
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...
01:25Acute Inflammation III: Local and Systemic Effects
Acute inflammation produces a coordinated set of local and systemic changes that limit injury, eliminate pathogens, and initiate repair. These responses arise within minutes of infection, trauma, or chemical insult and are driven by vascular alterations and leukocyte-derived mediators. When the stimulus resolves, the reaction typically abates within days.Local EffectsAt the site of injury, arteriolar vasodilation increases blood flow, resulting in redness and warmth. Simultaneously, increased...
01:26Acute Inflammation I: Inflammatory Response
Acute inflammation is a rapid, short-lived physiological response to tissue injury or infection, designed to eliminate harmful agents and initiate repair. This tightly regulated process typically lasts from minutes to several days and is triggered by factors such as microbial invasion, physical trauma, or chemical injury.Recognition and Mediator ReleaseThe inflammatory response begins when resident immune cells—such as mast cells, macrophages, and dendritic cells—detect damage-associated...