Staphylococcus sp.

Question 1

S. aureus important enzymes

Answer 1

coagulase, hyaluronidase, lipase

Question 2

hyaluronidase function

Answer 2

hydrolizes the hyaluronic acid in connective tissue

Question 3

lipase function

Answer 3

breaks down oils and fats secreted by skin’s sebaceous glands

Question 4

these S. aureus enterotoxins cause food poisoning

Answer 4

A, B, and D

Question 5

these S. aureus enterotoxins are associated with toxic shock syndrome

Answer 5

B, C, sometimes G and I

Question 6

this toxin is primarily associated with toxic shock syndrome

Answer 6

TSST-1 (toxic shock syndrome toxin 1)

Question 7

this S. aureus phage group produces enterotoxins

Answer 7

phage group I

Question 8

this toxin makes skin slough off

Answer 8

exfoliative toxin

Question 9

this S. aureus phage group produces exfoliative toxin

Answer 9

phage group II

Question 10

alpha-hemolysin function

Answer 10

destroys platelets and tissues

Question 11

beta-hemolysin function

Answer 11

lyses RBCs by acting on sphingomyelin

Question 12

delta-hemolysin function

Answer 12

acts on cells and leukocytes (less lethal)

Question 13

gamma-hemolysin is aka/associated with

Answer 13

Panton-Valentine leukocidin

Question 14

gamma-hemolysin function

Answer 14

kills neutrophils, prevents phagocytosis

Question 15

protein A negates the function of this antibody

Answer 15

IgG

Question 16

protein A function

Answer 16

binds fragment crystallizable portion of antibodies to avoid phagocytosis

Question 17

important symptom of toxic shock syndrome

Answer 17

disseminated intravascular coagulation

Question 18

S. aureus causes these skin infections (6 infections)

Answer 18

boils, carbuncles, furuncles, folliculitis, impetigo, scalded skin syndrome

Question 19

S. aureus causes these other miscellaneous infections (5 infections)

Answer 19

secondary pneumonia after influenza A, bacteremia and endocarditis in IV drug users, osteomyelitis (bacteria invade bone), arthritis (bacteria in joint)

Question 20

S. epidermidis is predominantly ________ infections

Answer 20

nosocomial

Question 21

S. epidermidis is associated with this infection

Answer 21

hospital-acquired UTIs

Question 22

primary virulence factor of S. epidermidis

Answer 22

biofilm/slime layer

Question 23

S. saphrophyticus is associated with this infection

Answer 23

UTIs in young sexually-active women

Question 24

components of CNA agar

Answer 24

Columbia agar base, colistin, nalidixic acid, 5% sheep blood agar

Question 25

components of mannitol salt agar

Answer 25

peptone base, mannitol, 7.5% salt, phenol red indicator

Question 26

this coagulase-negative Staphylococcus can mimic coagulase-positive result

Answer 26

S. lugdunensis