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Neuro Block 3-RG > Otitis Media > Flashcards

Otitis Media Flashcards

1
Q

Acute otitis media

A

bacterial or viral

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2
Q

Otitis media with effusion

A

buildup of fluid in Eustachian tube, no infection

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3
Q

Why are kids more suceptible to otitis media?

A

tubes are narrow and more horizontal

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4
Q

Biggest bug in otitis media

A

S. pneumoniae

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5
Q

S. pneumoniae
Gram
shape

A

Gram +

diplococcus

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6
Q

How do you differentiate between S. pneumonia strains?

A

quarum testing (antibodies)

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7
Q

What keeps S. pneumoniae in the blood?

A

capsule (prevents phagocytosis)

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8
Q

What are choline-binding proteins?

A

bind carbohydrates present on surface of epithelial cells (S. pneumoniae)

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9
Q

What are neuramidases?

A

cleave host mucins (S. pneumoniae)

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10
Q

What is pneumolysin?

A

pore-forming toxin is released disrupting cilia (S. pneumoniae)

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11
Q

H. influenzae host

A

humans

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12
Q

What grows only on chocolate agar?

A

H. influenzae and Moraxella catarrhalis

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13
Q

Normal H. influenzae: capsulation status

A

non-capsulated (non-typable)

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14
Q

H. influenzae has this resistance factor that sucks for amoxicillin?

A

beta-lactamases

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15
Q 
M. catarrhalis
Gram
Shape
Oxidase status
Motile
Growth media
Pili status
A 
Gram -
diplococcus
oxidase-positive
nonmotile
chocolate agar
pili
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16
Q

What causes “brush fire” visual field defects?

A

CMV (usually immunocompromised)

17
Q

Adding clavulinate to amoxicillin improves its spectrum for which bugs?

A

H. influenzae and Moraxella catarrhalis

18
Q

Which two bacteria grow almost exclusively on chocolate agar?

A

H. influenzae

Moraxella catarrhalis

19
Q

Biggest two bugs in otitis externa

A

Staph

Pseudomonas aeruginosa

20
Q

Pseudomonas aeruginosa

-Gram

A

Gram -

21
Q

Tx of otitis externa

A

neomyxin

Neuro Block 3-RG (23 decks)

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