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CWSF 2005 - Vancouver, British Columbia

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Brenna Schilds, Shauna Chabot

Toothbrushes: Friend or Foe
Division:Health Sciences
Region:Northern British Columbia
City:Dawson Creek, BC
School:Ecole Frank Ross Elementary School
Abstract:To find out how much bacteria grew on a toothbrush, we tested the toothbrushes of 8 individuals over different periods of time: 1 week, 2 weeks, 4 weeks, and 8 weeks. Bacteria levels decreased for most test subjects after two weeks and continued to decrease at 8 weeks.