The purpose of this practical is to investigate the effect of antiseptics or antibiotics on bacterial growth using agar plates and measuring zones of inhibition. This allows the selected bacteria ...

This type of medium is both selective and differential. The MSA will select for organisms such as Staphylococcus species which can live in areas of high salt concentration (plate on the left in the ...

This medium is both selective and differential. The selective ingredients are the bile salts and the dye, crystal violet which inhibit the growth of Gram-positive bacteria. The differential ingredient ...