Bacterial lawn. Learning objectives To be able to describe how to measure the concentration or potency of a substance by its effect on living cells or tissues (bioassay)
- applying discs containing measured amounts of antibiotics, which will diffuse out.
How long would these laboratory tests take? Explain why.
About 24 hours (or at least overnight) - to give the culture a chance to grow (or be killed!)
What is meant by the following?
Broad spectrum antibiotic
Narrow spectrum antibiotic
Minimal inhibitory concentration
Minimum lethal concentration