Which clinical feature distinguishes meningitis from encephalitis?

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Multiple Choice

Which clinical feature distinguishes meningitis from encephalitis?

Altered mental status reflects brain parenchymal involvement and is what helps distinguish encephalitis from meningitis. Meningitis mainly inflames the meninges and typically presents with fever, headache, neck stiffness, and photophobia, with mental status usually preserved early. Encephalitis, by contrast, involves the brain tissue itself and classically presents with confusion, decreased alertness, personality or behavior changes, and sometimes seizures. So the key distinguishing feature is altered mental status, pointing toward encephalitis. The other statements fit meningitis signs (fever, neck stiffness, photophobia) or are not reliable differentiators (neck stiffness can occur with meningitis, and seizures can occur with meningitis as well).

Altered mental status reflects brain parenchymal involvement and is what helps distinguish encephalitis from meningitis. Meningitis mainly inflames the meninges and typically presents with fever, headache, neck stiffness, and photophobia, with mental status usually preserved early. Encephalitis, by contrast, involves the brain tissue itself and classically presents with confusion, decreased alertness, personality or behavior changes, and sometimes seizures. So the key distinguishing feature is altered mental status, pointing toward encephalitis. The other statements fit meningitis signs (fever, neck stiffness, photophobia) or are not reliable differentiators (neck stiffness can occur with meningitis, and seizures can occur with meningitis as well).

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