Inhibiting growth of some bacteria types, and encouraging the growth of other bacteria. Of the bacteria that do grow, visual changes in the agar or the bacterial colonies occur?
Selective and differential media
Selective for Gram-bacteria. Differential because it contains lactose and some Gram-bacteria can ferment lactose which will produce different looking colonies(fish eyes). Another example, E.coli colonies are a green metallic color?
EMB(Eosin Methylene Blue Agar) Selective and Differential
Selective for acid- producing organisms cavity. Differential because it contains a pH indicator that changes color when pH becomes more acidic from growth of these organisms(If happens something changes color, of not nothing happens)?
Snyder Test agar Selective and Differential media
Selective for enteric bacteria (intestinal Gram-). Differential due to colony appearance in presence of lactose, Similar to EMB?
MAC(MacConkey Agar) Selective and differential media
Mostly everything can grow(ex.TSA)
Used of Specific test, Always used(Ex. Mueller Hinton II for antibiotic testing?