LISTERIA MOTILITY MEDIUM

Bacterial motility is one of the important determinants in making a final species identification. Bacteria move by means of flagella, the number and location of which vary among different species. Semisolid media in tubes are most commonly employed for detecting motility. Motility media have agar concentration of 0.4% or less. The motility test is interpreted by making a macroscopic examination of medium for a diffused zone of growth flaring out from the line of inoculation. Listeria monocytogenes requires room temperature incubation before motility develops, since in some organisms; flagellar proteins develop more rapidly at lower temperatures (room temperature) such as in L. monocytogenes and Yersinia enterocolitica. Listeria Motility Medium is formulated in accordance with ISO Committee specification for the determination of motility by L. monocytogenes.

for testing motility of Listeria monocytogenes