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Microbiology - Clinical Infectious Disaese > Neuro ID > Flashcards

Flashcards in Neuro ID Deck (17)
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1

Most common bugs causing meningitis in the general population?

S. Pneumoniae,
N. meningitidis
H Influenza Type B (more in kids)
Enteroviruses, HSV

2

Empirical treatment of meningitis in the general population?

Ceftriaxone and vanco

3

What bug to suspect in babies w/ meningitis? Drug?

Group B Strep, E. coli, Listeria. Ampicillin.

4

What bug to suspect in people w/ h/o brain surgery and meningitis? Treat?

Staph Aureus (Vanc).

5

Most common bug causing meningitis in teenagers?

N. meningitidis

6

Most common bugs causing meningitis in the elderly?

S. pneumo, Gram neg rods, Listeria

7

Treatment of Lyme meningitis?

IV ceftriaxone.

8

Best first step when suspicion of meningitis?

- Start empiric treatment (Ceftriaxone + vancomycin) + steroids if high suspicion for bacterial.
- Exam for elevated ICP/CT
- LP + gram stain (>1000 WBC = diagnostic).

9

CSF findings in bacterial meningitis? (opening pressure, cell type, protein, sugar).

Cloudy/purulent fluid, High opening pressure, high PMNs, high protein, low sugar

10

CSF findings in viral meningitis? (opening pressure, cell type, protein, sugar).

Clear fluid, normal/high opening pressure, high lymphocytes, normal/high protein, normal sugar

11

CSF findings in fungal meningitis? (opening pressure, cell type, protein, sugar)

Cloudy fluid, high opening pressure, high lymphocytes, high protein, low sugar

12

What differentiates fungal vs. viral meningitis?

appearnce of fluid (cloudy vs. clear), sugar (low vs. normal).
If lymphs + low sugar --> fungal/TB.

13

Normal CSF findings

Opening pressure: 10-20cm
Appearance: clear
Cells: 0-5
Protein: 60% of serum glucose

14

What to do about roommate of kid who has bacterial meningitis + petechial rash?

Rifampin

15

Most common causes of brain abscesses?

Viridans streptococci, Staph Aureas. Oral anaerobes if dental infxn preceding.

16

Etiology of single vs. multiple abscesses?

Single lesion from contiguous sites (otitis, mastoididtis, sinusitis, etc).
Multiple usually from bacteremia

17

Abscesses in HIV?

Toxoplasma