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Flashcards in Meningitis Deck (21):
1

What are the leptomeninges, and why are they named as such?

Arachnoid and pia--lighter color = lepto

2

What is the basic definition of meningitis?

Inflammation of the leptomeninges

3

What are the three most common causes of meningitis in the neonate?

GBS
E.coli
Listeria Monocytogenes

(GEL)

4

What is the most common cause of meningitis in children and adolescents?

Neisseria Meningitidis

5

What is the most common cause of meningitis in the adults and elderly?

Strep pneumoniae

6

What is the most common cause of meningitis in non-vaccinated infants?

H. influenzae

7

What is the most common viral cause of meningitis?

Coxsackievirus

8

How does Neisseria enter the meninges?

Through the nasopharynx

9

What is the classic triad of meningitis?

HA
Neck stiffness
Fever

10

It is much more common to see photophobia in meningitis, when it is caused by viruses or bacteria?

viruses

11

What is the classic site for an LP?

L4-L5 interspace

12

What level does the spinal cord end? Where does the cauda equina end?

L2

S2

13

What layer of the meninges are NOT pierced with an LP

Pia

14

PMNs + low glucose in CSF = what etiology?

Bacterial

15

Lymphocytes with normal CSF glucose = what etiology?

Viral

16

Lymphocytes with low CSF glucose = what etiology?

Fungal

17

Why are most of the complications of meningitis, associated with bacterial meningitis?

Increased pus causes hydrocephalus, hearing loss, and Szs

18

What causes hydrocephalus from meningitis?

Fibrosis of pathways of the CSF

19

What is the normal fraction of glucose in the CSF relative to the serum?

2/3

20

What causes the hearing loss post meningitis?

Damage to the nerves as they exit the brain

21

What causes the increased risk of seizures post meningitis?

Scarring of the cortex