Monday - Diebel - infectious disease

Question 1

what usually causes necrotizing fasciitis. distinguishing characteristics?

Answer 1

group A strep.

gram +
use peroxidase (cat -)
beta-hemolytic
faculative anerobe

Question 2

What causes gas gangrene type necroizing fasciitis? distinguishing characteristics?

Answer 2

Clostridium perfringens

gram+
bacilli
spore-forming
obligate anaerobe

Question 3

Normal WBC range

Answer 3

4,500 to 11,000

Question 4

Immature neutrophils are called what?

mature?

Answer 4

immature = banded nuclues pattern
mature = lobular

Question 5

Normal ESR

Answer 5

20mm/hr

Question 6

Normal CRP

Answer 6

<1mg/dl

Question 7

characteristics of S. Aureus

Answer 7

gram +
cocci
catalase +
coagulase +

Question 8

Characteristics of neisseria gonorrhoeae

Answer 8

gram -
diplococci
oxidase +
only glucose oxidizer

Question 9

Things that cause ostiomyelitis

characteristics of the ones you haven’t learned yet

Answer 9

Staph A

salmonella typhii (Gram - bacilli, lactose non-fermenter, oxidase -, produces H2S). Kids with sickle cell especially prone.

pasteurella multocida (Gram - coccobacilli, oxidase +, catalase +, cat’s mouth flora)

Question 10

WBC count differential in %

Answer 10

basophil Less than or equal to 2
Eosinophil Less than or equal to 5
lymphocyte 22-44
monocyte 3-9
neutrophil 40-60

Question 11

Common causes of acute infectious arthritis

Answer 11

Staph A

N. gonorrhoeae