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NERVOUS SYSTEM DISEASES
CHAPTER 24
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Anatomy Review Central Nervous System Peripheral Nervous System
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CNS Features Meninges - membranes surrounding brain tissue-Dura mater, Pia mater, arachnoid mater, doesit mater Blood Brain Barrier- tight junctions between endothelial cells in CNS vessels prevent
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Bacterial Diseases Bacterial meningitis most commonly caused by one of three types of bacteria: Haemophilus influenzae type b, Neisseria meningitidis (meningococcus), and Streptococcus pneumoniae bacteria Brain Abscesses
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Viral Diseases Viral meningitis enteroviruses Rabies Lyssavirus genus
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Rabies Statistics
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Rabies Statistics
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Viral Diseases (cont.) Viral Encephalitis Herpes Meningoencephalitis
inflammation of the brain parenchyma, Herpes Meningoencephalitis
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Viral Diseases (cont.) West Nile Fever
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West Nile Virus WNV has three different effects on humans. The first is an asymptomatic infection; the second is a mild febrile syndrome termed West Nile Fever; the third is a neuroinvasive disease termed West Nile meningitis or encephalitis. The population proportion of these three states is roughly 110:30:1
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Bacterial Nerve Diseases
Hansen’s Disease
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Bacterial Nerve Diseases
Tetanus Botulism “lockjaw Clostridium tetani Blocks acetocholine release
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Viral Nerve Diseases — Polio
Poliovirus (poliomyelitis) preferentially infecting and destroying motor neurons
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Prion Diseases Mad Cow Disease Kuru
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Prion Diseases Creutzfeld Jacob Variant Disease
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Parasitic Disease African Sleeping Sickness Chaga’s Disease
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