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Handwashing Experiment

Handwashing Experiment. Do you wash your hands? Do you use soap?. Only 68% of Americans wash their hands after using the restroom. Each year, nearly 22 million school days are lost to the common cold.

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Handwashing Experiment

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  1. Handwashing Experiment

  2. Do you wash your hands?Do you use soap? • Only 68% of Americans wash their hands after using the restroom. • Each year, nearly 22 million school days are lost to the common cold. • Thoroughly washing hands is the single most important thing students can do to keep from getting sick or to keep from infecting others.

  3. Questions • Which form of hand washing will be most effective at eliminating bacterial growth? Hypothesis: • Which side of the public restroom door contains the least amount of bacteria? Hypothesis:

  4. Procedure • Obtain 2 agar plates and label them as follows: Don’t forget to put your period and group # inside outside URT ULT WRT ULT

  5. Determine which handwashing method your group will use. You can choose from the following: tap water, regular soap, antibacterial soap, hand sanitizer. Write the method you use on your agar plate. • Gently press your unwashed left thumb (ULT) into both the upper and lower quadrants. • Press the unwashed right thumb (URT) onto the agar. • Wash your hands according to the method you are testing. All students should wash hands for 20 seconds. • After washing and drying with a paper towel, press washed right thumb (WRT) onto the agar. • Decide which public restroom door to test. Take two cotton swabs, a tube of distilled water, and the labeled restroom agar plate to that restroom door. • Swab the inside door knob that is most likely touched and gently streak the agar with swab. Repeat for outside knob with other swab.

  6. Discussion Questions • Do your results support your hypothesis? Explain. • Why did you do your left unwashed thumbprint twice? • Based on your class data, which method of handwashing is the most effective? Explain. • Based on your class data, which side of the bathroom door contains the least amount of bacteria? Explain. • What have you learned from doing this experiment?

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