Food poisoning, Osteomyelitis, Nosocomial infections - mostly buzzwords

Question 1

Vomiting 1-6 hours after eating potato salad at picnic

Answer 1

S. aureus - preformed toxin V not D

Question 2

vomiting 1-6 hours after eating reheated rice

Answer 2

B. cereus - preformed toxin

Question 3

vomiting and watery D on cruise

Answer 3

norovirus

Question 4

Watery D 12 hrs after eating meat or poultry from cafeteria

Answer 4

C. perfringens - spores survive high temps –> grow

Question 5

Inflammatory diarrhea 1-3 days after eating undercooked meat/poultry, eggs, or produce

Answer 5

salmonella

Question 6

Inflammatory diarrhea after eating undercooked hamburger meat, followed by AKI

Answer 6

E coli O157:H7 –> hemolytic uremia Sn in kids - bloody D

Question 7

Inflammatory diarrhea after eating raw seafood

Answer 7

Vibrio parahaemolyticus

Question 8

Inflammatory diarrhea followed by ascending paralysis

Answer 8

C. jejuni - undercooked poultry

Question 9

Descending paralysis after ingestion of homemade canned goods

Answer 9

C. botulinum

Question 10

Inflammatory diarrhea

Answer 10

leukocytes in stool

invasion into intestine –> fever, abd pain, blood/mucus in diarrhea

Question 11

osteomyelitis in patient with sickle cell disease

Answer 11

salmonella

Question 12

osteomyelitis in patient with prosthetic device

Answer 12

S. epidermidis

Question 13

osteomyelitis involvement of vertebrae

Answer 13

mycobacterium tuberculosis - Potts dz

Question 14

osteomyelitis following cat bite

Answer 14

Pasteurella multocida

Question 15

osteomyelitis in IV drug user

Answer 15

S. aureus, Pseudomonas, Serratia, Candida

Question 16

Diabetic w/ foot ulcer –> osteomyelitis

Answer 16

polymicrobia
Pseudomonas
anaerobes

Question 17

osteomyelitis w/ puncture wound to foot through sneaker

Answer 17

pseudomonas

Question 18

Osteomyelitis

Answer 18

Hematogenous spread, contiguous spread, direct inoculation (trauma or surgery)

Sx: 
fever/chills
pain, redness, swelling
Leukocytosis
elevated ESR and CRP

XRay not helpful early
MRI
Radionuclide bone scan

Bone bx and cx

MC cause: S. aureus w/o sickle cell dz

Question 19

Foley catheter associated UTI

Answer 19

E coli
Gram - rods
Pseudomonas
Candida

Question 20

Ventilator associated pneumonia

Answer 20

Pseudomonas

S. aureus

Question 21

Aspiration pneumonia

Answer 21

polymicrobial

anaerobes

Question 22

Central lines infections

Answer 22

S. epidermitis - coag - staph

Question 23

Surgical wounds/decubitus ulcer infections

Answer 23

S. aureus

Question 24

Parenteral nutrition assoc infection

Answer 24

Candida bacteremia

Question 25

Nosocomial diarrhea

Answer 25

C. diff