🏥 USMLE Exam Prep

A 72-year-old woman with a history of diabetes mellitus and chronic kidney disease presents with sudden onset fever, headache, nuchal rigidity, and altered mental status. CSF analysis is pending. Which empiric antibiotic regimen is most appropriate for this patient?

A Ceftriaxone and vancomycin
B Ampicillin, ceftriaxone, and vancomycin
C Doxycycline and ceftriaxone
D Meropenem and vancomycin

✓ Correct Answer: Option B

For elderly or immunocompromised patients with suspected bacterial meningitis, empiric coverage must include Ampicillin for Listeria monocytogenes, in addition to ceftriaxone (S. pneumoniae, N. meningitidis) and vancomycin (resistant S. pneumoniae).

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