Student Laboratory Report 35 35 Evaluation of Antiseptics and Disinfectants: The
ID: 263066 • Letter: S
Question
Student Laboratory Report 35 35 Evaluation of Antiseptics and Disinfectants: The Filter Paper Disk Method A. Results With a metric ruler, measure the zones of inhibition on all four plates, and record this information in the table below Zone of Inhibition (mm) DISINFECTANT/ANTISEPTIC Staphylococcus aureus aeruginosa 3% Hydrogen peroxide 5% Lysol 5% iodine 1:10 Bleach Mouthwash Betadine isopropyl alcoho 2. Which chemical was the most effective for inhibiting the growth of S. aureus ? Of P. aeruginosa? 3. Which chemical was the least effective for inhibiting the g rowth of S. aureus? Of P. aeruginosa? 4. What do your results indicate about the relative chemical resistances of these two species? Short-Answer Questions 1. Differentiate between antiseptic and disinfectant. Include examples of each in your answer. Indic whether any chemicals can be used as both.Explanation / Answer
2) hydrogen peroxide is the most effective chemical for inhibiting growth these two bacteria.
3) least effective would be iodine .
Both antiseptic and disinfectant may sound similar ,but both have many major differences. Both are used to limit the microbial growth and be used as germicide .But antiseptic is generally used to prevent sepsis in wounds or injure body part or live tissue on the other hand disinfectant is used to surface or medical equipment to kill the microorganisms that might reside there.examples
antiseptic - boric acid , hydrogen peroxide, iodine ,alcohol.
Disinfectant- Formaldehyde ,ozone , chlorine dioxide, chloramine ,bleach