How well do disinfectants work?
By: Darwin Rivas
Scientific Question Which of the disinfectants will work better against bacteria?
Hypothesis If the disinfectant have a higher porcentage of alcohol, then it will be more effective fighting bacteria.
What is bacteria?
Bacteria are single celled microbes. The cell structure is simpler than that of other organisms as there is no nucleus or membrane bound organelles. Instead their control centre containing the genetic information is contained in a single loop of DNA. Some bacteria have an extra circle of genetic material called a plasmid. The plasmid often contains genes that give the bacterium some advantage over other bacteria. For example it may contain a gene that makes the bacterium resistant to a certain antibiotic.
What are fomites?
A fomite refers to inanimate objects that can carry and spread disease and infectious agents. Fomites can also be called passive vectors.
Staphylococcus Aureus
To prove my hypothesis I did an experiment in which I tested 5 different disinfectants against bacteria; to do it I used:
Nutrient agar plates. Swabs. Tweezer or forceps. Cotton balls. Large plastic cutting board. Permanent marker. Slice of lunch meat. Small cups for holding disinfectant solutions. 5 different disinfectant solutions.
Results
Conclusion In conclusion the only disinfectant that didn't prove its effectivity was water as during the observation period it showed 1 bacterial colony.
Bibliography
https://microbiologysociety.org/why-microbiology-matters/what-is-microbiology/bacteria.html
https://www.sciencebuddies.org/science-fair-projects/project-ideas/microbio_p012/microbiology/how-well-do-disinfectants-work#summary
https://www.news-medical.net/health/What-are-Fomites.aspx
Thanks for your attention
How well do disinfectants work?
darwin.rivas
Created on March 1, 2021
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Transcript
How well do disinfectants work?
By: Darwin Rivas
Scientific Question Which of the disinfectants will work better against bacteria?
Hypothesis If the disinfectant have a higher porcentage of alcohol, then it will be more effective fighting bacteria.
What is bacteria?
Bacteria are single celled microbes. The cell structure is simpler than that of other organisms as there is no nucleus or membrane bound organelles. Instead their control centre containing the genetic information is contained in a single loop of DNA. Some bacteria have an extra circle of genetic material called a plasmid. The plasmid often contains genes that give the bacterium some advantage over other bacteria. For example it may contain a gene that makes the bacterium resistant to a certain antibiotic.
What are fomites?
A fomite refers to inanimate objects that can carry and spread disease and infectious agents. Fomites can also be called passive vectors.
Staphylococcus Aureus
To prove my hypothesis I did an experiment in which I tested 5 different disinfectants against bacteria; to do it I used:
Nutrient agar plates. Swabs. Tweezer or forceps. Cotton balls. Large plastic cutting board. Permanent marker. Slice of lunch meat. Small cups for holding disinfectant solutions. 5 different disinfectant solutions.
Results
Conclusion In conclusion the only disinfectant that didn't prove its effectivity was water as during the observation period it showed 1 bacterial colony.
Bibliography
https://microbiologysociety.org/why-microbiology-matters/what-is-microbiology/bacteria.html https://www.sciencebuddies.org/science-fair-projects/project-ideas/microbio_p012/microbiology/how-well-do-disinfectants-work#summary https://www.news-medical.net/health/What-are-Fomites.aspx
Thanks for your attention