What Kills Germs LAB

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Olivia Spears Mrs. Wisniew Biology, Red 3 1 April 2014 What Kills Germs? Lab Report I. What Kills Germs: II. Statement of the Problem: A. What antibacterial substance disinfects an object the best? B. Background information about Bacteria is that they are fast growing organisms that need to be contained. C. Independent Variables: antibacterial soap, household bleach, household disinfectant, penicillin, amoxicillin, erythromycin D. Dependent Variables: Hemophilus influenzae, Straphylococcus aureus, Streptococcus E. Control Variable: Sterile Filter Paper III. Hypothesis: If the most effective solution for pathogenic bacteria is household bleach, then the descending order from best to least are household bleach,…show more content…
So that proves that for different pathogenic agents there are different solutions. C. A lesson I learned is that using only filter water to get something off my hand does not work as well as using soap and water. D. Errors that could have occurred in the experiment is measuring errors when measuring where no bacteria has grown, another error that could have occurred is putting the data in the wrong box. IX. Questions: 1.) The effects of the different antibiotic drugs differed in reactions. No, they were not as effective at controlling bacteria growth. In the lab when you tested the experiment the results showed that with some antibiotic drugs the bacterial growth grew instead of being contained. For example Penicillin worked well when used to treat Hemophilus influenzae and Streptoccocus pneumonia but did not work well on Straphylococcus aureus, Amoxicillin had a similar effect of these pathogenic bacteria. While Erthromycin was different by working well on Straphylococcus aureus but not being good on Hemophilus influenzae and Streptoccocus pneumonia. 2.) The chemical disinfectants were stronger than the regular household antibacterial drugs and a person may see this when they look at the big circle of inhibition of none bacterial growth. The different chemical disinfectants had different effectiveness at controlling bacterial growth some were more
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