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Uptodate Reference Title
Motility testing on nonlactose fermenting gram negative rods
Motility testing on nonlactose fermenting gram negative rods
Left tube: The nonmotile Shigella does not migrate away from the central stab line in the agar. Right tube: Motile Proteus produces visible opacification of the agar away from the central stab line. The color difference between the two samples is unrelated to the motility test.