Exercise 5-28 Micro Lab: Motility Test

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1

Motility Test Medium

a semisolid medium designed to detect bacterial motility

2

in the MTM, what changes to the agar have been done?

the agar concentration has been reduced from 1.5% to 0.4%, enough to allow movement of motile bacteria

3

How is motility detected?

as diffuse growth radiating from the central stab line

4

a _____ is sometimes added to MTM to make detection easier

tetrazolium salt (TTC)

5

What is a positive detection for motility?

it is indicated when the red (reduced) TTC is seen radiating outward from the central stab

6

What is a negative result for motility?

it shows red only along the stab line

7

Motility is important in ________ bacteria

Enterobacteriaceae