Prescott's Microbiology
11th Edition
ISBN: 9781260211887
Author: WILLEY, Sandman, Wood
Publisher: McGraw Hill
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Textbook Question
Chapter 8.4, Problem 2CC
Retrieve, Infer, Apply
2. In the past, spoiled milk was responsible for a significant proportion of infant deaths. Why is untreated milk easily spoiled?
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COMPUTATIONAL TRUE OR FALSE
Milk sample A contained an average of 53 cells per FOV at a dilution factor of 7 whereas Milk sample B contained an average of 99 cells per FOV at a dilution factor of 5. Therefore, milk sample A has less microbial contamination. (Note: 0.01mL of each sample was placed on a clean glass slide and both samples were examined under OIO with an area of 1.77x10-4 cm2.)
Chapter 8 Solutions
Prescott's Microbiology
Ch. 8.1 - MICRO INQUIRY Which types of agents can be used...Ch. 8.1 - Retrieve, Infer, Apply 1. Define the following...Ch. 8.1 - Retrieve, Infer, Apply 2. What is the difference...Ch. 8.2 - MICRO INQUIRY Examine graph (a). How long would it...Ch. 8.3 - MICRO INQUIRY How might one verify that filtration...Ch. 8.3 - Retrieve, Infer, Apply 1. What are depth filters...Ch. 8.3 - Retrieve, Infer, Apply 2. Describe the operation...Ch. 8.4 - Retrieve, Infer, Apply 1. Describe how an...Ch. 8.4 - Retrieve, Infer, Apply 2. In the past, spoiled...Ch. 8.4 - Prob. 3CC
Ch. 8.4 - Retrieve, Infer, Apply 2. What is the correlation...Ch. 8.5 - MICRO INQUIRY Why is it important that all of...Ch. 8.5 - MICRO INQUIRY Why are cross-linking agents such as...Ch. 8.5 - Retrieve, Infer, Apply 1. Why are most...Ch. 8.5 - Retrieve, Infer, Apply Construct a table that...Ch. 8.5 - Retrieve, Infer, Apply 3. Which disinfectants or...Ch. 8.5 - Retrieve, Infer, Apply 4. How do phenolic agents...Ch. 8.5 - Retrieve, Infer, Apply 5. Which physical or...Ch. 8.6 - Retrieve, Infer, Apply 1. Briefly explain how the...Ch. 8.6 - Retrieve, Infer, Apply How does being in a biofilm...Ch. 8.6 - Retrieve, Infer, Apply Suppose hospital custodians...Ch. 8.6 - Retrieve, Infer, Apply Briefly describe the phenol...Ch. 8.6 - Retrieve, Infer, Apply Why might it be necessary...Ch. 8.7 - Retrieve, Infer, Apply How would you explain to a...Ch. 8.7 - Retrieve, Infer, Apply Propose the use of specific...Ch. 8 - Prob. 1RCCh. 8 - Throughout history, spices have been used as...Ch. 8 - Design an experiment to determine whether an...Ch. 8 - Suppose you tested the effectiveness of...Ch. 8 - Prob. 4AL
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- Computational True or False. UHT-pasteurized milk sample X which was spread-plated in quadruplicates yielded the following bacterial colony counts: 23, 20, 35 and 41 CFU/plate at a dilution factor of 100. Therefore, the milk sample will pass laboratory standards if the quality control laboratory sets the total microbial limit as: “not to exceed more than 30,000 CFU/mL of milk sample”.arrow_forwardMicrobial sensivity lab: Why are Escherichia coli, Pseudomonas aeruginosa, and StaphyLococcus aureus used as standards in the Kirby Bauer method?arrow_forwardxplain the four stages of the growth curve for a microorganism. What is the generation time? Which aspect of the growth curve is used to calculate the generation time and why? How is the generation time calculated and why does it make sense that E.coli and M.tuberculosis have such drastically different generation times?arrow_forward
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