agar concentration is reduced from typical 1.5-0.4% just enough to...
maintains its form while allowing movement of motile bacteria
motility is detectable as?
diffuse growth radiating from the central stab line
what is sometimes added to the medium to make interpertation easier?
tetrazolium salt (TTC)
an electron acceptor
in oxidized form, TTC is
colorless & soluble
when TTC is reduced it is,
red & insoluble
motility is an important differential chacteristics of?
red diffuse growth radiating outward from the stab line
the organism is motile (+)
red growth only along the stab line
The organism is nonmotile (-)