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Zorluk: OrtaInfectious Diseases

Match each patient's clinical presentation and cerebrospinal fluid (CSF) analysis findings with the most appropriate targeted or empiric treatment regimen.

  • A 22-year-old college student presents with fever, severe headache, nuchal rigidity, and a petechial rash. CSF reveals 1200 WBCs/µL (90% neutrophils), glucose 25 mg/dL, and protein 150 mg/dL.Intravenous ceftriaxone and vancomycin
  • A 65-year-old man presents with acute fever, confusion, and new-onset focal seizures. CSF reveals 150 WBCs/µL (95% lymphocytes), glucose 65 mg/dL, protein 80 mg/dL, and numerous erythrocytes.Intravenous acyclovir
  • A 45-year-old woman with advanced HIV (CD4 count = 30 cells/mm³) presents with subacute headache and lethargy. CSF reveals an opening pressure of 350 mm H2O, 50 WBCs/µL (90% lymphocytes), glucose 30 mg/dL, and protein 100 mg/dL.Intravenous amphotericin B and oral flucytosine
  • A 30-year-old man recently emigrated from a highly endemic region presents with a 3-week history of low-grade fever, weight loss, and cranial nerve VI palsy. CSF reveals 300 WBCs/µL (predominantly lymphocytes), glucose 20 mg/dL, and protein 250 mg/dL.Isoniazid, rifampin, pyrazinamide, ethambutol, and dexamethasone

Cevap

The correct pairings match each central nervous system infection's classic clinical phenotype and cerebrospinal fluid profile to its definitive or empiric antimicrobial therapy (bacterial to ceftriaxone/vancomycin, viral HSV to acyclovir, fungal cryptococcal to amphotericin/flucytosine, and mycobacterial to RIPE+steroids).
Each matching pair requires recognizing the classic clinical phenotype and CSF profile of a specific CNS infection to select the correct corresponding antimicrobial therapy. Bacterial meningitis presents with neutrophilic pleocytosis and hypoglycorrhachia. HSV encephalitis typically causes temporal lobe necrosis leading to RBCs in the CSF with a lymphocytic pleocytosis. Cryptococcal meningitis is associated with high opening pressures in immunocompromised hosts. TB meningitis typically presents subacutely with cranial nerve palsies, profound hypoglycorrhachia, and extremely high protein.

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1
Analyze the CSF profile and clinical presentation for the 22-year-old student.
Identification of a neutrophilic pleocytosis with low glucose and petechial rash, indicative of bacterial meningitis.
This classical presentation dictates immediate empiric therapy with broad-spectrum antibacterials covering S. pneumoniae and N. meningitidis.
2
Evaluate the 65-year-old man with confusion, seizures, and CSF erythrocytes.
Diagnosis of suspected HSV encephalitis, which requires empiric intravenous acyclovir.
Erythrocytes in a lymphocytic, normal-glucose CSF profile strongly suggest the hemorrhagic temporal lobe necrosis typical of HSV.
3
Assess the HIV-positive patient with an extremely high CSF opening pressure.
Diagnosis of cryptococcal meningitis, necessitating induction therapy with amphotericin B and flucytosine.
Cryptococcus uniquely causes severe intracranial hypertension with a mild lymphocytic pleocytosis in immunocompromised hosts.
4
Review the subacute presentation of cranial nerve palsy and highly elevated CSF protein in the immigrant patient.
Diagnosis of tuberculous meningitis, requiring RIPE therapy and dexamethasone.
Basilar exudates causing cranial neuropathies alongside subacute lymphocytic meningitis are the hallmark of CNS tuberculosis.

Anahtar Kavram

Cerebrospinal fluid (CSF) analysis interpretation and appropriate empiric therapy for central nervous system infections
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Infectious Diseases

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