Transcript HW: So why would some antimicrobials be more

HW: So why would some antimicrobials be
more effective than others?
Bacteria may have a mutation that makes them
resistant to the particular antimicrobial
Resistance develops when the antimicrobial
has been overused. The antimicrobial has acted
as a selection pressure
Only those bacteria that are resistant can
grow in the area.
Analysing Results – Part 3
Using the method, you now need to re-collect the
dishes from last lesson and analyse the results
7. Examine your plate and try to identify the colonies which
have not been able to grow near the Multidisk arm(s). These
are called zone(s) of inhibition. Turning the plate upside
down and using a ruler measure the diameter of the zones of
inhibition. Calculate the area of the zone of inhibition using
the formula
Area of zone = πr2 (Use 3.14 as π)
8. Record your results in a suitable table
Skills Outcomes:
PS2.2 Present
data in
appropriate ways
PS 3.2 Process
and analyse data
using
appropriate
mathematical
skills
PS3. 2.3
Evaluate results
and draw
conclusions with
reference to
measurement
Evaluating Results
Conclusion
Draw a simple conclusion on which was the most effective
antimicrobial
Evaluation:
You need to comment on the accuracy, precision and
reliability of your data. Is your data valid? If some values
are questionable, why might that be? Where could errors
have entered into your investigation? Make reference to
specific values in your evaluation, explain why these may
be anomalous/erroneous. Could it be because of an error
in your procedure or could it be an error in analysis? If
you unsure about the reliability of your data, compare it
with others in the group.
Skills Outcomes:
PS2.2 Present
data in
appropriate ways
PS 3.2 Process
and analyse data
using
appropriate
mathematical
skills
PS3. 2.3
Evaluate results
and draw
conclusions with
reference to
measurement