Prácticas de Microbiología. Pruebas bioquímicas para la identificación de bacterias. Vídeo 8

Differential media are used to distinguish bacteria with different metabolic characteristics. They typically contain a pH indicator that allows for differentiation of the chemical reactions carried out by the bacteria. Selective media, on the other hand, contain compounds, usually dyes, that inhibit the growth of some microorganisms but not others. Some media can be both differential and selective, such as MacConkey agar. This video demonstrates the use of two differential media, MacConkey and TSI, to determine whether a bacterium ferments sugars. TSI agar also allows for the detection of gas production during fermentation and whether the bacterium is capable of anaerobic respiration using sulfate or thiosulfate. Series of 11 videos. Coordinator: Purificación Calvo Ruiz, Professor, Department of Microbiology, Faculty of Biology, University of Seville. Authors: Purificación Calvo Ruiz, Francisco Pérez Montaño, and Nuria Madinabeitia Peiró ISBN: 978-84-15881-79-7