Dura Mater
The tough outer meningeal membrane surrounding the central nervous system.
Meningvax / Disease Biology
Meningitis: understanding the biology of meningeal inflammation.
Meningitis is an inflammatory condition affecting the protective membranes surrounding the brain and spinal cord. Explore the anatomy of the meninges, the biological mechanisms of inflammation, causative pathogens, and the scientific foundations of diagnosis and prevention.
Explore Meningitis Types
Figure 01 / Protective Meninges / Schematic
02 / Meningeal Anatomy
CENTRAL NERVOUS SYSTEM
What is meningitis?
Meningitis is inflammation of the meninges, the membranes covering the brain and spinal cord. These tissues provide structural protection and surround the cerebrospinal fluid spaces.
Inflammation may result from infectious agents, including bacteria, viruses, fungi, and certain parasites, or from non-infectious causes.
Disease severity depends on the underlying cause, the host immune response, and the clinical context. Bacterial meningitis can progress rapidly and requires urgent medical attention.
Arachnoid Mater
The intermediate meningeal membrane. The subarachnoid space beneath it contains cerebrospinal fluid.
Pia Mater
A delicate inner membrane closely following the surface of the brain and spinal cord.
03 / Meningitis Classification
PATHOGENS / ETIOLOGY
Understanding the different forms of meningitis.
Meningitis is not caused by one microorganism. The infectious or non-infectious origin influences its biological mechanisms, clinical management, and preventive approaches.
Bacterial Meningitis
Bacterial meningitis is caused by bacterial pathogens, including Neisseria meningitidis, Streptococcus pneumoniae, and other species. It may progress rapidly and can cause severe neurological complications.
Explore Bacterial MeningitisViral Meningitis
Viral meningitis can be caused by enteroviruses, herpesviruses, and other viruses. Many cases are self-limited, although severity varies with the pathogen and individual risk factors.
Explore Viral MeningitisCauses of Meningitis
Explore bacterial, viral, fungal, parasitic, and non-infectious causes. Different etiologies involve distinct exposures, biological mechanisms, risk factors, and clinical considerations.
Explore Meningitis Causes
04 / Disease Pathogenesis
HOST / PATHOGEN / INFLAMMATION
The biology behind meningeal inflammation.
The mechanisms of meningitis vary by cause. In some bacterial infections, disease develops through pathogen invasion, central nervous system access, and an inflammatory host response.
Pathogen Exposure
Exposure and colonization patterns depend on the pathogen and its transmission route.
Invasive Infection
Certain organisms can overcome host defenses and spread beyond their initial site of infection.
CNS Involvement
Pathogens may reach the meninges through different routes, including bloodstream dissemination in some infections.
Immune Activation
Host inflammatory responses contribute to symptoms and, in severe cases, neurological injury.
05 / Clinical Significance
SYMPTOMS / DIAGNOSIS / PREVENTION
Why the underlying cause matters.
Meningitis may cause symptoms such as fever, headache, neck stiffness, nausea, sensitivity to light, and changes in mental status. Presentations can differ by age and cause.
Diagnosis depends on clinical assessment and appropriate investigations. Depending on the circumstances, cerebrospinal fluid analysis, culture, and molecular testing may contribute to identifying the cause.
Prevention includes vaccination against several important bacterial pathogens, alongside other public-health and infection-control measures appropriate to the cause.
Important:
Meningitis can be
a medical emergency.
Symptoms suggesting
meningitis require
urgent medical
assessment.
Scientific information
should not delay care.