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BIOS 242 Week 4 Assignment; Lab 7 of 14 Onsite; Disinfectants and Antibiotics, Assignments of Health sciences

Activate LearningHealth sciences

BIOS 242 Week 4 Assignment; Lab 7 of 14 Onsite; Disinfectants and Antibiotics Lab Report: Disinfectants and Antibiotics Purpose: Describe the purpose of the lab. Exercise 1: Disinfectants Organism 1: Be sure to record the chemical or product you tested and complete this table by obtaining data from other groups in your class Organism 2: Be sure to record the chemical or product you tested and complete this table by obtaining data from other groups in your class...

Typology: Assignments

2023/2024

Available from 07/18/2024

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Lab 7: Chemical Methods of Microbial Growth Control: Disinfectants
Lab Report
the purpose of the lab was to Identify how household cleaners affect the growth of bacteria and to figure out how effective is various of
antibiotics against Gram-positive and Gram-negative bacteria.
Exercise 1: Disinfectants
Organism 1:
Growth Scale: 0= No Growth; 5=Maximum Growth
Be sure to record the chemical or product you tested and complete this table by obtaining data from other groups in your class
Times of Exposure Organism Used: B. subtilis (Gram positive)
-Name of the cleaner:
10% bleach
Name of the cleaner:
Hydrogen Peroxide
0 min
5 5
1 min
3 4
5 min
3 3
2 2
pf3
pf4
pf5

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Lab 7: Chemical Methods of Microbial Growth Control: Disinfectants

Lab Report

the purpose of the lab was to Identify how household cleaners affect the growth of bacteria and to figure out how effective is various of antibiotics against Gram-positive and Gram-negative bacteria. Exercise 1: Disinfectants Organism 1: Growth Scale: 0= No Growth; 5=Maximum Growth Be sure to record the chemical or product you tested and complete this table by obtaining data from other groups in your class

Times of Exposure Organism Used: B. subtilis (Gram positive)

  • Name of the cleaner: 10% bleach Name of the cleaner: Hydrogen Peroxide 0 min

1 min

5 min

10 min

  1. Was your test chemical effective? Briefly explain. Looking from my groups pictures, the chemical test was effective by disinfecting
  2. Was your test chemical more effective that the lab disinfectant? Briefly explain. 10 % bleach was the disinfect. And H202 was able to disinfect the bacteria entirely in 10 mins.
  3. Was your test chemical bactericidal or bacteriostatic? The test was bacteriostatic meaning that it stunted the growth of the bacteria.
  4. Look up the label of the preparation you tested. What is (are) the active ingredient(s)? The active ingredients are 10 percent bleach and 3 percent hydrogen Peroxide.
  5. Using your textbook or another reference, find the method of action of the active ingredient(s) in the test substance. One method of action would be Oxygen in H202 in a test tube. Oxygen can stunt the growth of bacteria.

Exercise 2: Antimicrobial Agents Antimicrobial Agent Disk Code E. coli B. subtilis Zone Size (mm) S, I or R* Zone^ Size (mm) S, I, or R* Penicillin P10^ 38mm^ S^ N/A^ R Erythromycin E15^ 25mm^ S^ N/A^ R Tetracycline TE30 N/A R 50mm S Questions

  1. Which antimicrobial agents were most effective against each organism? The antimicrobial agents that were the most effective against each organism was Tetracyline, most effective against B subtilis. Penicillin was most effective against E coil.