Meningitis_102008-1

Meningitis_102008-1 - Meningitis Biology301 Fall2008...

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Meningitis Biology 301 Fall 2008
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Overview What is Meningitis? Viral and Bacterial Types Symptoms Diagnosis Treatment Pathogenesis (Biological mechanism) Case Studies Discussion
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What is Meningitis? Meningitis  is an inflammation of the  meninges  (membranes  surrounding the brain and spinal cord). Usually due to an infection of the  cerebrospinal fluid (CSF)  with a  foreign micro-organism.
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Types of Meningitis Viral Meningitis Greater number of cases than  bacterial type. Caused by a few different  VIRUSES Enteroviruses –46%  ( Coxsackie virus ) Herpes Simplex 1 (31%) and  2 (4%) Varicella zoster (11%) Others May improve without  treatment. Most common in children.
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Types of Meningitis Viral Meningitis Symptoms: Acute onset of fever Headache Photophobia Neck stiffness Lethargy Altered mental state Nausea/vomiting Most common type of  meningitis. Spontaneous recovery is  usual. At initial presentation,  must go to hospital for  immediate testing, since  the symptoms are not  distinguishable from  bacterial meningitis.
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Types of Meningitis Bacterial Meningitis Most dangerous type. Acute bacterial meningitis occurs when bacteria enter the bloodstream,  cross the blood-brain barrier into the CSF and invade the brain and spinal  cord. Symptoms are identical to viral meningitis: Acute onset of fever Headache Photophobia Neck stiffness Lethargy Altered mental state
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This note was uploaded on 01/19/2010 for the course BIOL 301 taught by Professor Kocache,m during the Spring '08 term at George Mason.

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Meningitis_102008-1 - Meningitis Biology301 Fall2008...

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