Infection

Question 1

abx choice for cellulitis

Answer 1

ancef

Question 2

most common organism for cat bite

Answer 2

pasteurella multocida

Question 3

Mc organism for human bite

Answer 3

eiknella corroden

Question 4

mc organism for cat-scratch dz

Answer 4

Bartonella henselae

Question 5

Abx of choice for bites

Answer 5

augmentin 250-500 mg PO tid

Question 6

most common organism puncture wound causing cellultiis

Answer 6

staph aureus

Question 7

most common organism puncture wound causing osteomyelitis

Answer 7

pseuodmonas aeruginosa

Question 8

sequestrum

Answer 8

piece of dead bone floating in pus/inflammation

Question 9

Invulcrum

Answer 9

The reactive bone that forms around the necrotic sequestrum is referred to as the involucrum

Question 10

cloaca

Answer 10

when an opening develop in the invulcrum allowing necrotic purulent material out of bone

Question 11

if the cloaca extends to skin; opening from the bone to soft tissue, is called what?

Answer 11

sinus tract

Question 12

Brodie abscess

Answer 12

subacute osteomyelitis; usually found in metaphysis

infection walled off by reactive bone and may remain dormant

Question 13

mC organism for erysipela

Answer 13

strep pyogenes

Question 14

MC organism for gas gangrene

Answer 14

Clostridium perfringens

Question 15

abx for type I open fx

Answer 15

1st gen cephalosporin for 24 hours after closure

Question 16

abx for type II open fx

Answer 16

1st gen cephalosporin for 24 hours after closure

Question 17

abx for type III open fx

Answer 17

1st generation cephalosporin for gram positive coverage.
Aminoglycoside (such as gentamicin) for gram negative coverage in type III injuries

the cephalosporin/aminoglycoside should be continued for 24-72 hoursafter the last debridement procedure

Question 18

abx for open fx with farm injury

Answer 18

penicillin to cover anaerobes

Question 19

abx for open fx with fresh water wound vs salt water wound

Answer 19

Flouroquinolones- fresh water

doxycycline-salt water

Question 20

Gram + cocci in chains vs clusters

Answer 20

Chain: strep

Cluster: staph

Question 21

when an open fracture is contaminated, what gustillo level is it?

Answer 21

automatically type III

Question 22

Golden period for treatment of puncture wound?

Answer 22

24 hrs

Question 23

Delay for osteomyelitis changes on XR

Answer 23

14 days, same with stress fx

Question 24

Which imaging modality is best for a wood foreign body?

Answer 24

MRI

Question 25

Most common organism in paronychia?

Answer 25

Staph aureus

Question 26

Most common organism for osteomyelitis in a sickle cell patient?

Answer 26

salmonella

Question 27

Most common organism for acute burn wounds? chronic burn wounds?

Answer 27

Acute: s. aureus
Chronic: pseudomonas

Question 28

Duration and route of antibiotic therapy if there is no residual infected tissue?

Answer 28

PO/IV 2-5 days

Question 29

Duration and route of antibiotic therapy with residual infected soft tissues but not bone?

Answer 29

PO/IV 2-4 weeks

Question 30

Duration and route of antibiotic therapy for residual infected but viable bone?

Answer 30

PO/IV 4-6 weeks

Question 31

Duration and route of antibiotic therapy with residual dead bone post-op?

Answer 31

IV and then PO 3+ months

Question 32

What oral antibiotics have high bioavailability? (6)

Answer 32

Clindamycin
Bactrim
Doxycycline 
Monocycline
Linezolid 
Fluoroquinolone