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lab 4

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

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#1
Front (Question)

selective media

Back (Answer)

will inhibit the growth of different bacteria to allow for one specific type to grow

#2
Front (Question)

differential media

Back (Answer)

will allow growth of multiple types of bacteria, but they will look different on a plate

#3
Front (Question)

what is an example of both selective and differential

Back (Answer)

Mannitol Salt Agar

#4
Front (Question)

How is Mannitol Salt Agar selective ?

Back (Answer)

due to high salt concentration (7.5-10%) and used for the ISOLATION of gram + bacteria, pathogenic Staphylococci and non pathogenic Staphylococci. PREVENTS GROWTH OF GRAM -

#5
Front (Question)

How is Mannitol Salt Agar differential ?

Back (Answer)

it contains mannitol that can be fermented and PHENOL RED.

#6
Front (Question)

What color indicates fermentation ?

Back (Answer)

acidic and yellow

#7
Front (Question)

What is a sign of no fermentation ?

Back (Answer)

red color

#8
Front (Question)

How is MacConkey Agar selective ?

Back (Answer)

Bile salts isolate gram (-) bacteria by inhibiting gram (+) bacteria.

#9
Front (Question)

How is MacConkey Agar differential?

Back (Answer)

Lactose is used to differentiate bacteria based on their ability to ferment

#10
Front (Question)

In MacConkey Agar, what color indicates fermentation of lactose ?

Back (Answer)

pink

#11
Front (Question)

What color is it when fermentation does not occur ?

Back (Answer)

pale color

#12
Front (Question)

How is Vogel Johnson Agar selective ?

Back (Answer)

Selective for gram (+) by use of LiCl, tellurite, and glycine content

#13
Front (Question)

How is Vogel Johnson Agar differential?

Back (Answer)

Contains mannitol and phenol red indicator for differentiation (just like the mannitol salt agar)

#14
Front (Question)

In Vogel Johnson Agar, which color indicates fermentation?

Back (Answer)

yellow

#15
Front (Question)

What can bacteria do differently in Vogel Johnson Agar>

Back (Answer)

Bacteria can reduce tellurite to tellurium = black

#16
Front (Question)

How is Eosin Methylene Blue selective?

Back (Answer)

Methylene blue isolates gram (-) by inhibiting gram (+) bacteria

#17
Front (Question)

How is Eosin Methylene Blue differential?

Back (Answer)

Lactose and sucrose fermentation is used to differentiate

#18
Front (Question)

How is Brilliant Green Agar selective?

Back (Answer)

isolates gram (-) bacteria

#19
Front (Question)

How is Brilliant Green Agar differential?

Back (Answer)

Lactose and sucrose fermentation is used to differentiate bacteria.

#20
Front (Question)

What color indicates fermentation?

Back (Answer)

yellow

#21
Front (Question)

what color indicates no fermentation in brilliant green agar ?

Back (Answer)

red

#22
Front (Question)

How is Hektoen Enteric Agar selective ?

Back (Answer)

bile salts isolate gram (-) bacteria by inhibiting gram (+) bacteria (

#23
Front (Question)

how is Hektoen Enteric Agar differential?

Back (Answer)

used to differentiate between Shigella and Salmonella bacteria

#24
Front (Question)

what color indicates lactose fermentation?

Back (Answer)

orange