8 -- bacterial virulence

Question 1

adhesin

Answer 1

enables binding of organisms to host tisue

Question 2

invasin

Answer 2

enables the organism to invade a host cell

Question 3

impedin

Answer 3

enables the organism to avoid host defense

Question 4

aggressin

Answer 4

causes damage directly

Question 5

modulin

Answer 5

induces damage indirectly

Question 6

microbiology of skin is typically gram -ve

Answer 6

false

usually thicker (gram +) but certain areas are gram -ve

Question 7

in scalded skin syndrome, what is not formed which leads to the exfolliative toxin?

Answer 7

`bridges are missing

Question 8

where does a superantigen bind>

Answer 8

not as MHC class II area, but instead joins adjacent to the binding site

Question 9

diagnostic criteria for toxic shock syndrome

Answer 9

fever
diiffuse macular erythroderma (sunburn)
hypotension

> 3 organ systems involved (liver,blood,renl,mucous membranes, GI ,muscular, CNS)

Question 10

adhesins work through extra cellular matrix molecues, where are these present?

Answer 10

endothelial, epithelial, blood clots

Question 11

necrotizing pneumonia cannot be treated using antibiotics as

Answer 11

immune system is dysfunctional and so will not clear the antigen

Question 12

type of skin conditions associated with strep pyogenes

Answer 12

impetigo
cellulitis
erysipelas
necrotizing fascitis