CNS Flashcards
Meningitis
Most common cause of Bacterial Meningitis in neonates?
- Group B Strep (agalactiae)
- E. Coli
- Listeria monocytogenes
Most common cause of Bacterial Meningitis in adolescents?
Neisseria Meningitidis
Most common cause of Bacterial Meningitis in adults?
Strep. Pneumoniae
Most common cause of Bacterial Meningitis in adults over 60?
- S.pneumoniae
- N.meningitidis
- H. influenzae
Clinical Presentation of Bacterial Meningitis?
- Fever
- Nuchal Rigidity
- Altered Mental Status
- Headache
Complications with S. pneumoniae?
- Seizures
- Cerebral Infarction
Complications with N. meningitidis?
- Non-suppurative pharyngitis
- Petechiae/ Purpura
- Myalgia
- Septic Arthtitis
Which clinical presentations indicate CT scan prior to a lumbar puncture?
- Papilledema
- Altered mental status
- Focal neurologic deficit
- Immunocompromised state
- New-onset seizure (within 1 week)
- History of CNS disease or head trauma
CSF findings indicative of bacterial meningitis:
- Opening pressure >200 mm H2O
- WBC count1000-5000/microL
- > 80% neutrophils
- Protein >200mg/dL
- Glucose <40mg/dL
- CSF:serum glucose ratio ≤0.4
Physical Exam tests that indicate Bacterial Meningitis?
- Kernig’s sign- Unable to extend leg w/ a bent knee
- Brudzinski sign- Knees bend when head is flexed
Empiric treatment for Bacterial Meningitis?
- Vancomycin + 3rd gen Cephalosporin (Ceftriaxone)
* Add Dexamethasone for S. pneumo or unknown
What treatment should be added to the regimen in patients over 50 to cover Listeria?
Ampicilin
Empiric Treatment for Neonatal Meningitis?
Ampicillin + Cefotaxime/Amionglycoside
Empiric Treatment for patients with penetrating head trauma or recent neurosurgery?
Vancomycin + Ceftazidine/ Cefepine/ Meropenem
What prophylactic treatment is recommended for people exposed to N. Meningitidis?
- Rifampin
- Ciprofloxacin
- Ceftriaxone