The Effects Of Mouthwash On Bacteria
By Rob K.
The purpose of this experiment was to find out which mouthwash kills the most bacteria.The procedure in which this experiment was carried out consists of soaking 2 sterile discs in each mouthwash. Then scraping the roof of the mouth with a cotton swab and then applying it to the petrii dish and repeating 10 times. Then I applied the sterile discs to the petrii dishes and put them in the incubator for 11/2 days. Then observe the growth on each petrii dish. The mouthwash that was thought to kill the most bacteria was cepacol.
The materials used were mouthwashes that include Cepacol, Scope, Listerine, and a Rite Aid brand. The use of a incubator sterile discs, and tweezers were also included.
The mouthwash that had the largest zone of inhibition was Cepacol. The mouthwash that had the second largest zone was Scope which also had the best average because Cepacol number 2 was contaminated. The third largest zone was Listerine. The Rite Aid brand had the least largest zone of inhibition and the worst average. The results that occurred were due to different levels such as the amount of alcohol and Quaternary ammonium Compounds.
The hypothesis is excepted Cepacol did kill the most bacteria. Though Scope had the best average.