Culture

(kul’-chiir) [colere, to till]. The growth of microorganisms on artificial media. The act of cultivating microorganisms on artificial media. C, Hanging-drop, a culture in which the microorganism is inoculated into a drop of fluid on a cover-gla and the latter is inverted over a gla slide having a central concavity. C. Media, certain substances used for cultivating bacteria. They are either liquid or solid, bouillon and milk being the important liquid, and gelatin, agar-agar, blood-serum, and potato, the principal solid media. C, Plate, a culture of bacteria on a medium spread upon a flat plate or in a double dish. C, Pure, a culture of a single microorganism. C, Stab, one in which the medium is inoculated by means of a needle bearing the microorganisms, and which is inserted deep down into the medium. 216