Effect of Antibiotics on Bacteria Growth

Front

What should be done after soaking a filter paper disc in an antibiotic?

Back

Place the disc on a Petri dish with bacterial culture.

Front

What temperature and duration are recommended for incubating the Petri dish?

Back

Incubate for 48-72 hours at 25 °C.

Front

What is measured to compare the antibacterial properties of the chemicals?

Back

Measure the radius/diameter of any clear zones around the discs.

Front

What conclusion can be drawn if there is no clear zone around a disc soaked in antibiotic?

Back

The bacteria are resistant to that antbiotic.

Front

Name one factor that should be controlled to ensure a fair test when comparing results.

Back

Using the same type of bacteria.

Front

What is another factor that needs to be controlled for a valid test?

Back

Using the same antibiotics.

Front

How would you know which antibiotic is the most effective?

Back

The one with the largest clear zone around it.