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All the things > Meningitis > Flashcards

Meningitis Flashcards

1
Q

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

A

Arachnoid and pia–lighter color = lepto

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2
Q

What is the basic definition of meningitis?

A

Inflammation of the leptomeninges

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3
Q

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

A

GBS
E.coli
Listeria Monocytogenes

(GEL)

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4
Q

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

A

Neisseria Meningitidis

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5
Q

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

A

Strep pneumoniae

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6
Q

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

A

H. influenzae

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7
Q

What is the most common viral cause of meningitis?

A

Coxsackievirus

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8
Q

How does Neisseria enter the meninges?

A

Through the nasopharynx

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9
Q

What is the classic triad of meningitis?

A

HA
Neck stiffness
Fever

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10
Q

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

A

viruses

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11
Q

What is the classic site for an LP?

A

L4-L5 interspace

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12
Q

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

A

L2

S2

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13
Q

What layer of the meninges are NOT pierced with an LP

A

Pia

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14
Q

PMNs + low glucose in CSF = what etiology?

A

Bacterial

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15
Q

Lymphocytes with normal CSF glucose = what etiology?

A

Viral

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16
Q

Lymphocytes with low CSF glucose = what etiology?

A

Fungal

17
Q

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

A

Increased pus causes hydrocephalus, hearing loss, and Szs

18
Q

What causes hydrocephalus from meningitis?

A

Fibrosis of pathways of the CSF

19
Q

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

A

2/3

20
Q

What causes the hearing loss post meningitis?

A

Damage to the nerves as they exit the brain

21
Q

What causes the increased risk of seizures post meningitis?

A

Scarring of the cortex

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