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Insects and the germs they carry Featured science projectScience project video


The results show that the petri dishes exposed to the cockroach and the ant had more pronounced bacteria growth compared to the petri dishes exposed to  the fly and the beetle.

Insect Diameter of bacterial growth (mm)
  Day 1 Day 2 Day 2 Day 4 Day 5
Beetle 2 4 7 9 12
Cockroach 4 8 14 24 38
Ant 3 7 16 28 44
Fly 2 5 9 14 22

The graph below represents the results of our science experiment:

insects germs science fair project

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Complexity level:
Project cost ($):
Time required:
1 day to prepare, 5 days for the science project experiment
Material availability:
Access to laboratory equipment (eg. petri dishes)
Safety concerns:

Always follow laboratory safety guidelines and always practice sterile technique when handling microbes. Never have any food or drink at your workstation and always thoroughly wash your hands with disinfectant soap or alcohol before leaving your workstation. Always dispose of used material in a biohazard bag. If none are available, the bacteria should be destroyed with bleach before being disposed of.  Knives should be handled under adult supervision.