microbiology

Question 1

gram positive cell wall

Answer 1

has more peptidoglycan
stains purple

Question 2

gram negative cell wall

Answer 2

-thinner peptidoglycan layer
- has a periplsamic space
- inner membrane
s
- stains pink

Question 3

endotoxins

Answer 3

Lipopolysaccharide in outer membrane of Gram-negative bacteria
“Endotoxic lipid A” and “O antigen”
Elicits strong immune responses and can make patients appear “septic”

Question 4

superantigens

Answer 4

Exotoxins liberated by certain gram-positive bacteria

Produced intracellularly and released as mature toxins on infection

Staphylococcus aureus, Streptococcus pyogenes

Massive immune stimulation
Non-specific polyclonal T-cell stimulation
Toxic shock syndrome