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The Effect of Antibacterial Soap Brand on Bacterial Life Decrease

CSEF · 2018 Product Science (Biological) (Junior Division Only)

Lindsey E. Williams · The Children's School, La Jolla, San Diego County

Overview

Objectives/Goals The goal of this experiment was to find what brand of antibacterial soap is most effective to kill bacteria. Methods/Materials Bacteria samples, Petri dishes, incubator inoculator, three brands of antibacterial soap. Grew bacteria colonies and treated them with various kinds of soap. Results It was found that Softsoap kills 55% of bacteria, Dial kills 50% of bacteria, Trader Joe's kills 6% of bacteria, and no treatment kills 0.75% of bacteria. Conclusions/Discussion Bacteria colonies were tested to find what brand of antibacterial soap is most effective to kill bacteria. It was found that more natural soaps are less effective at killing bacteria than chemical soaps.

Summary statement

After testing different brands of antibacterial soap on bacteria, it was found that Softsoap is the most effective at killing bacteria.

Help received

In addition to the help I received from my school and family, I was assisted by Dr. Kaitlyn Hanley. She helped me form my procedure so that it was safe and effective, answer my many questions, and encourage me to persevere in my project.

Competition history

  • CSEF 2018 Product Science (Biological) (Junior Division Only) · Entry J2022

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