Exam 2 Selective Media Flashcards
1
Q
MSA selects for:
A
Staphylococci and some other Gram-positive species that can withstand high salt concentrations
2
Q
MSA inhibits:
A
Gram-negative growth
3
Q
Inhibitor in MSA
A
Sodium Chloride
4
Q
MSA substrate
A
Mannitol
5
Q
MSA Indicator
A
Phenol Red
6
Q
Positive result on MSA
A
Media turns yellow if mannitol fermentation occurs (generally S. aureus)
7
Q
Negative result on MSA
A
Media is red
8
Q
MAC selects for:
A
Gram-negative enteric species
9
Q
MAC inhibits:
A
Gram-positive non-enteric species
10
Q
MAC Inhibitor
A
Bile Salts and Crystal Violet
11
Q
MAC substrate
A
Lactose
12
Q
MAC Indicator
A
Neutral Red
13
Q
MAC Positive result
A
Pink/red growth if lactose fermentation occurs
14
Q
MAC negative result
A
Colorless or yellow growth if no lactose fermentation occurs
15
Q
EMB selects for:
A
Gram-negative enteric species
