Foundations in Microbiology
10th Edition
ISBN: 9781259705212
Author: Kathleen Park Talaro, Barry Chess Instructor
Publisher: McGraw-Hill Education
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Chapter 11.L2, Problem 3CT
3. It may seem contradictory that lyophilization can be used to preserve foods yet also be used to keep cultures of microbes viable. Explain how these applications can be reconciled.
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1. Which of the following micro-organisms are the most resistant to heat sterilization?
a. Vegetative bacteria (e.g., Samonella spp.)
b. Spore-forming mesophilic bacteria (e.g., Clostridium botulinum)
c. Spore-forming thermophilic bacteria (e.g., Bacillus stearothermophilus)
d. Toxicogenic bacteria (e.g., E. coli O157:H7)
e. All of the above are equally resistant to heat sterilization.
1. How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes.
2. Suppose you do the Kirby-Bauer test on a hypothetical Staphylococcus species with penicillin and tetracycline. You record diameters of 20mm for tetracycline and 24mm for penicillin. Which antibiotic is most effective against this bacterium and why? Please explain and interpret these results.
3. Please provide the scientific name of your microbe that was used in the UV experiment (i.e. S. aureus). Compare your plates and interpret/analyze your results. Please discuss your findings and any patterns you were able to gather.
4. After performing the “Effects of Antiseptics & Disinfectants” lab which agent(s) showed potential to control S. marcescens growth? P. aeruginosa? Please explain why you believe these agent(s) work.
5. What purpose does water serve in the “Effects of Antiseptics & Disinfectants” lab? What did you…
1. Explain what is Coulter Counter method in microbiology and its advantages and disadvantages?
Chapter 11 Solutions
Foundations in Microbiology
Ch. 11.1 - Prob. 1ELOCh. 11.1 - Prob. 2ELOCh. 11.1 - 3. Define and differentiate among the major terms...Ch. 11.1 - 4. Characterize the parameters of microbial death,...Ch. 11.1 - 5. Summarize what factors influence the...Ch. 11.1 - 6. Identify the targets of antimicrobial control...Ch. 11.1 - Prob. 1CYPCh. 11.1 - Prob. 2CYPCh. 11.1 - 3. Contrast various microbes and rate their...Ch. 11.1 - 4. Explain how the types and numbers of...
Ch. 11.1 - Prob. 5CYPCh. 11.1 - Prob. 6CYPCh. 11.1 - Prob. 7CYPCh. 11.1 - Prob. 8CYPCh. 11.2 - Prob. 7ELOCh. 11.2 - Prob. 8ELOCh. 11.2 - Prob. 9ELOCh. 11.2 - 10. Differentiate between thermal death point and...Ch. 11.2 - 11. Describe several moist heat methods and their...Ch. 11.2 - Prob. 12ELOCh. 11.2 - Prob. 13ELOCh. 11.2 - 9. What happens to microbes that encounter...Ch. 11.2 - 10. Summarize the nature, mode of action, and...Ch. 11.2 - 11. Explain the concepts of TDT and TDP, using...Ch. 11.2 - Prob. 12CYPCh. 11.2 - 13. How can the temperature of steam be raised...Ch. 11.2 - Prob. 14CYPCh. 11.2 - Prob. 15CYPCh. 11.2 - 16. Explain why desiccation and cold are not...Ch. 11.3 - Prob. 14ELOCh. 11.3 - 15. Differentiate between ionizing and nonionizing...Ch. 11.3 - Prob. 16ELOCh. 11.3 - Prob. 17ELOCh. 11.3 - Prob. 17CYPCh. 11.3 - Prob. 18CYPCh. 11.3 - 19. What are some advantages and disadvantages of...Ch. 11.3 - Prob. 20CYPCh. 11.3 - Prob. 21CYPCh. 11.4 - Prob. 18ELOCh. 11.4 - 19. Explain the desirable features of...Ch. 11.4 - 20. Describe the types of halogens, their modes of...Ch. 11.4 - 21. Identify the characteristics of phenolic...Ch. 11.4 - 22. Describe the characteristics of oxidizing...Ch. 11.4 - Prob. 23ELOCh. 11.4 - 24. Explain how detergents, soaps, and heavy...Ch. 11.4 - 22. Describe situations that require high-level...Ch. 11.4 - 23. What is the difference between a tincture and...Ch. 11.4 - 24. Define sterilant, and name the principal...Ch. 11.4 - 25. Summarize the chief forms and uses of chlorine...Ch. 11.4 - 26. What are the superior characteristics of...Ch. 11.4 - 27. What are the modes of action of alcohols and...Ch. 11.4 - 28. Why is hydrogen peroxide solution so effective...Ch. 11.4 - 29. Give the uses and disadvantages of the heavy...Ch. 11.4 - 30. What does it mean to say that a chemical has...Ch. 11.L1 - Prob. 1MCQCh. 11.L1 - Prob. 2MCQCh. 11.L1 - Prob. 3MCQCh. 11.L1 - Prob. 4MCQCh. 11.L1 - Prob. 5MCQCh. 11.L1 - Prob. 6MCQCh. 11.L1 - 7. The primary action of ______ heat is to ______....Ch. 11.L1 - Prob. 8MCQCh. 11.L1 - 9. Microbe(s) that is/are the target(s) of...Ch. 11.L1 - 10. Ionizing radiation like _________ removes...Ch. 11.L1 - Prob. 11MCQCh. 11.L1 - Prob. 12MCQCh. 11.L1 - Prob. 13MCQCh. 11.L1 - 14. A chemical with sporicidal properties is a....Ch. 11.L1 - 15. Silver sulfadiazine is used a. in antisepsis...Ch. 11.L1 - Prob. 16MCQCh. 11.L1 - Prob. 17MCQCh. 11.L1 - 1. How would one best describe the state of being...Ch. 11.L1 - Prob. 2CSRCh. 11.L1 - Prob. 3CSRCh. 11.L1 - Prob. 1WCCh. 11.L1 - Prob. 2WCCh. 11.L1 - Prob. 3WCCh. 11.L1 - 4. Think of three situations in which the same...Ch. 11.L1 - 5. Explain what features of endospores make them...Ch. 11.L1 - 6. Explain some of the problems involved in...Ch. 11.L1 - 7. The shelf life and keeping qualities of fruit...Ch. 11.L2 - 1. For each item on the following list, propose a...Ch. 11.L2 - Prob. 2CTCh. 11.L2 - 3. It may seem contradictory that lyophilization...Ch. 11.L2 - 4. A supermarket/drugstore assignment: Look at the...Ch. 11.L2 - 5. Devise an experiment that will differentiate...Ch. 11.L2 - 6. There is quite a bit of concern that chlorine...Ch. 11.L2 - 7. Was the source patient in the case study most...Ch. 11.L2 - 8. Explain why surfactant chemicals are more...Ch. 11.L2 - From chapter 2, figure 2.20. Study this...Ch. 11.L2 - 2. Explain what is happening with this graph that...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 1. How is UV radiation a good type of control mechanism against microbial growth? Please explain what happens to the microbe and effects this control causes. 2. Suppose you do the Kirby-Bauer test on a hypothetical Staphylococcus species with penicillin and tetracycline. You record diameters of 20mm for tetracycline and 24mm for penicillin. Which antibiotic is most effective against this bacterium and why? Please explain and interpret these results.arrow_forward2. Which of the following statements is true regarding steam sterilization? a. It is a universal technique, applicable to a product of any nature. b. At the same temperature, usually more effective than dry heat. c. Steam sterilization is amenable to a continuous workflow. d. The purpose of the steam is to keep the product from drying out during sterilization. Steam cannot be combined any other sterilization technique. е.arrow_forward9. Is the eosin methylene blue agar (EMB) a complex or defined medium? Explain based on its composition. Is MSA a A) differential, B) selective, or C) both differential and selective media? Explain based on what kind of microorganisms it allows to grow.arrow_forward
- 13. In relation to steps in product development in industrial microbiology, explain why optimization of production conditions must be done first in the laboratory before scaling up the production.arrow_forward2. You use tubes to test aerotolerance of bacteria. From your samples you have 3 results: A. Bacteria growing on the surface. B. Bacteria growing throughout the tube, the agar shows cracks. C. Bacteria growing about 5 mm below the surface. Please interpret each bacterial result. (Give the bacteria an oxygen classification, explain what classification means and interpret the cracks in the agar.) 3. Please explain how the use of an Eosin Methylene Blue Agar plate can help determine the type of fermenters that bacteria are. Please explain thoroughly.arrow_forward6. After culturing organisms on mannitol salt agar overnight at 37 degrees, one of them grew on MSA but did not generate a yellowing of the media. Which of the following could be interpreted from the results for this organism? A. Salt-tolerant Staphylococcus that does ferment mannitol. B. Organism is inhibited by salt and does not ferment mannitol. C. Salt-tolerant Staphylococcus that does not ferment mannitol. D. Organism is inhibited by salt and does ferment mannitol.arrow_forward
- 1. List down the factors that can cause contamination to your culture. 2. Why does the pH calibration is done before sterilization but pO2 calibration is done after sterilization? 3. What are the differences between impeller design for microbial, mammalian, and plant bioreactor and why they are designed in different ways?arrow_forward1. Which of the following statements about agar is NOT true? A. It is derived from algae. B. it is typically utilized by bacteria. C. It is solid at room temperature. D. It is the defining ingredient between liquid and solid versions of the same media.arrow_forward1. In terms of counting cells, what does a plating method accomplish that an electronic cell counting method does not? 2. Why does turbidity lose reliability at high cell concentrations when the culture reaches the stationary phase? 3. Some hyperthermophiles can survive autoclaving temperatures. Are they a concern in health care?arrow_forward
- 2. What of the following types of culture media allows the growth of specific microorganisms and suppresses the growth of other microorganisms? A. Selective B. Non-selective C. Enriched D. Differential E. None of the abovearrow_forward9. Which is statement below is the correct definition of the Sterility Assurance Limit (SAL). Select ONE answer. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability thaț a microorganism has survived a sterilisation process. O The Sterility Assurance Limit (SAL) is a numerical value that confirms that a microorganism has survived a pasturization process. O The Sterility Assurance Limit (SAL) is a numerical value that predicts the probability that a microorganism has been erradicated during a sterilisation processarrow_forward1. TRUE or FALSE. An autoclave can be used to sterilize growth media?arrow_forward
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