Laboratory culture Flashcards
1
Q
What’s a selective medium ?
A
used for the growth of only selected microorganisms.
2
Q
Bile salts inhibit grow of?
A
Gram +,
-permissive for Gram- enteric pathogens
3
Q
it’s a differentiate media because?
A
differentiate enterics based on their ability to ferment lactose
4
Q
differentiate btw?
A
- Lactose fermenters
- Lactose non-fermenters
5
Q
what color turn the lactose fermenters?
A
Pink
6
Q
color of the lactose non-fermenters ?
A
colorless
7
Q
the cells decompose lactose into?
A
glucose + galactose
8
Q
What happen to the glucose that was decomposed?
A
glycotytic pathway,then fermentation
9
Q
what do they release f=from the fermentation%
A
lactic acid and reduce PH (change of color)
10
Q
What does E.coli in a MacConkey agar?
A
Forms dark pink colonies with bike precipitate
