4. Discussion

4. Conclusion

4.1 Analysis of results & key findings
Generally for the 3 of us, the sample without mouthwash had significantly more bacteria present. (As expected).  


4.2 Explanation of key findings
As seen above, it has already been proven that mouthwash is a simple and effective way to kill bacteria. Mouthwash contains antibacterial enzymes, Cetylpyridinium chloride, and in some mouthwashes, alcohol. Alcohol, which is usually found in most Listerine mouthwashes, has anti­bacterial properties and helps prevent and reduce gingivitis and plaque above the gum line. Cetylpyridinium chloride is an ammonium compound that kills bacteria and inhibits plaque formation, hence, this ingredient is good at preventing bad breath.   


This is a piece of news that is very useful to most of us. We eat a lot of different things everyday which results in the growth of bacteria in our mouth. Oral hygiene is very important and the fact, obtained through this experiment, that mouthwash is a good way to kill the bacteria in our mouth.   


4.3 Evaluation of Hypothesis
Our hypothesis was correct as proven in the experiment. Although results may vary from people to people but the results obtained were very consistent in the sense that all three showed the swab we did without mouthwash had more bacteria as compared to the one with mouthwash.


4.4 Areas for improvement  
For some samples we did in the toilet, we could have done it in a more sterile area like under the spirit lamp, to decrease the amount of unwanted bacteria.




Limitations
Areas of improvement
Reasons
In the area of results
We only used 1 type of mouthwash
We can use more than 1 type or brand
We can get more results and see if the type of mouthwash affects the results
In the area of experimenting
The environment was not really that sterile
Do it in a more sterile area, but spirit lamp is good
Unwanted bacteria may enter the agar plates.

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