Types of Culture Media Type of Media Purpose Chemically Defined Growth of chemoheterotrophs and photoautotrophs: microbiological assays Complex Growth of most chemoheterotrophic organisms Reducing Growth of obligate anO2 Selective Suppresion of unwanted microbes; encouraging desired microbes Differential Differentiation of colonies of desired microbes from others Enrichment Similar to selective media but designed to increase numbers of desired microbes to detectable levels.
Three species of Candida can be differentiated in mixed culture when grown on CHROMagar Candida plates
To culture obligate anaerobes, all molecular oxygen must be removed and kept out of medium. Agar plates are incubated in sealed jars containing chemical substances that remove oxygen and generate carbon dioxide or water
Synchronous growth : A hypothetical situation in which the number of cells in a culture would increase in a stair-step pattern, dividing together at the same rate Nonsynchronous growth : A natural situation in which an actual culture has cell dividing at one rate and other cells dividing at a slightly slower rate