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The Effect of Closure Type on Preventing Microbial Contamination of Cosmetics Bacteria were isolated and identified from containers of shampoo and skin lotion that were in normal use. The containers had different types of closures, and the products had low antimicrobial contents. The shampoos had been in use for three weeks and the lotions fortwo weeks. Data Contamination Incidence (%) Organism Shampoo Skin Lotion Screw Slit Screw Flip Pump Gtrobacter 2 Enterobacter 4 4 2 Klebsiella 2 1 1 Pseudomonas 1 2 Serratia 2 1 Gram-neg. rod, nonfermenter Gram-neg. rod, fermenter 1 1 1 Questions 1. How did the bacteria get into the products? 2. Which type of closure isthe best? Why do you suppose this closure works best? 3 Why did the researchers test for these bacteria? ....... O o o O Oo o

The Effect of Closure Type on Preventing Microbial Contamination of Cosmetics Bacteria were isolated and identified from containers of shampoo and skin lotion that were in normal use. The containers had different types of closures, and the products had low antimicrobial contents. The shampoos had been in use for three weeks and the lotions fortwo weeks. Data Contamination Incidence (%) Organism Shampoo Skin Lotion Screw Slit Screw Flip Pump Gtrobacter 2 Enterobacter 4 4 2 Klebsiella 2 1 1 Pseudomonas 1 2 Serratia 2 1 Gram-neg. rod, nonfermenter Gram-neg. rod, fermenter 1 1 1 Questions 1. How did the bacteria get into the products? 2. Which type of closure isthe best? Why do you suppose this closure works best? 3 Why did the researchers test for these bacteria? ....... O o o O Oo o

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Bio 211b (Microbiology) Module 7.1 ASSIGNMENT The Effect of Closure Type on Preventing Microbial Contamination of Cosmetics Bacteria were isolated and identified from containers of shampoo and skin lotion that were in normal use. The containers had different types of closures, and the products had low antimicrobial contents. The shampoos had been in use for three weeks and the lotions fortwo weeks. Data Contamination Incidence (%) Organism Shampoo Skin Lotion Screw Slit Screw Flip Pump Gtrobacter 2 Enterobacter 4 4 2 Klebsiella 1 1 2 Pseudomonas 1 1 2 Serratia 2 1 Gram-neg. rod, nonfermenter Gram-neg. rod, fermenter 1 1 Questions 1. How did the bacteria get into the products? 2. Which type of dosure isthe best? Why do you suppose this closure works best? 3. Why did the researchers test for these bacteria? Pooo O o o o
Transcribed Image Text:Bio 211b (Microbiology) Module 7.1 ASSIGNMENT The Effect of Closure Type on Preventing Microbial Contamination of Cosmetics Bacteria were isolated and identified from containers of shampoo and skin lotion that were in normal use. The containers had different types of closures, and the products had low antimicrobial contents. The shampoos had been in use for three weeks and the lotions fortwo weeks. Data Contamination Incidence (%) Organism Shampoo Skin Lotion Screw Slit Screw Flip Pump Gtrobacter 2 Enterobacter 4 4 2 Klebsiella 1 1 2 Pseudomonas 1 1 2 Serratia 2 1 Gram-neg. rod, nonfermenter Gram-neg. rod, fermenter 1 1 Questions 1. How did the bacteria get into the products? 2. Which type of dosure isthe best? Why do you suppose this closure works best? 3. Why did the researchers test for these bacteria? Pooo O o o o
Worksheet 2. Draw it. Instruction: A bacterial culture was in log phase. At time x, an antibacterial compound was added to the culture. Draw the lines indicating addition of a bacterial compound and a bacteriostatic compound. Explain why the viable count does not immediately drop to zero at x? Time Log of number of cells
Transcribed Image Text:Worksheet 2. Draw it. Instruction: A bacterial culture was in log phase. At time x, an antibacterial compound was added to the culture. Draw the lines indicating addition of a bacterial compound and a bacteriostatic compound. Explain why the viable count does not immediately drop to zero at x? Time Log of number of cells
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