Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 32.3, Problem 1.2RIA
Why is the skin not always a favorable microenvironment for colonization by bacteria?
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Differentiate between normal microbiota and transient bacteria found on skin. Which type is more difficult to remove? Explain.
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Chapter 32 Solutions
Prescott's Microbiology
Ch. 32.1 - What methanogenic substrates are also available in...Ch. 32.1 - What is the nutritional type of the endosymbiotic...Ch. 32.1 - Prob. 3MICh. 32.1 - How does myxobacterial predation differ from that...Ch. 32.1 - How could one test to see if an insect-microbe...Ch. 32.1 - What is the role of the Riftia tube worms...Ch. 32.1 - Prob. 1.3RIACh. 32.1 - What is meant by tight trophic coupling between...Ch. 32.1 - Why is it important that the rumen is a reducing...Ch. 32.1 - Describe the mutualism between methanogenic...
Ch. 32.1 - How does cooperation differ from mutualism? What...Ch. 32.1 - Why is the X. nematophilaS. carpocapsae symbiosis...Ch. 32.1 - Prob. 3.1RIACh. 32.1 - Why is nitrification a good example of a...Ch. 32.1 - Define predation and parasitism. How are these...Ch. 32.1 - Prob. 3.4RIACh. 32.1 - What is a lichen? Why is this considered an...Ch. 32.1 - Describe the amensalism observed in attine ant...Ch. 32.1 - Prob. 4.2RIACh. 32.1 - What is the competitive exclusion principle? List...Ch. 32.2 - How might a microbial symbiont affect the uptake...Ch. 32.2 - Cite three reasons a germfree mouse would be more...Ch. 32.2 - People who suffer from colitis often find that...Ch. 32.3 - 1. Why is it important to understand the normal...Ch. 32.3 - Why is the skin not always a favorable...Ch. 32.3 - How do microorganisms contribute to body odor?Ch. 32.3 - Prob. 1.4RIACh. 32.3 - Prob. 2.1RIACh. 32.3 - What physiological processes move the microbiota...Ch. 32.3 - What is the role of pH in determining the...Ch. 32.3 - How would you define an opportunistic...Ch. 32 - Describe an experimental approach to determine if...Ch. 32 - Prob. 2CHICh. 32 - Prob. 3CHICh. 32 - Compare and contrast the microbial communities...Ch. 32 - The fruit fly Drosophila melanogaster is an...
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- Nonhealing wounds on the surface of the body are often extremely difficult to manage, in part because the microbial cause of the lack of healing is often extremely difficult to identify. Create a list of 4 reasons this might be the case.arrow_forwardA common characteristic of a site of infection, such as a pimple on the skin, is pus. What is responsible for the white color of pus?arrow_forwardFigure 5. Skin of Tomato under LPo. Type of simple permanent tissue:arrow_forward
- What feature of the skin creates a physical barrier to microbial invasion? Group of answer choices The outer layers are composed of cells full of protein which forms NETs to trap microbes until they are shed. The surface is constantly patrolled by phagocytic cells. The outer layers are dead cells, tightly linked together, and are frequently shed. All of these mechanisms can provide defense against microbial invaders. The oil secreted onto the surface of the skin traps microbes, preventing penetration. The fine hairs move microbes to mucous membranes for phagocytosis.arrow_forwardA 60-year-old man presents with a skin lesion on his face, which has been increasing in size for the past 6 months. He has been a farmer by occupation. His past medical history is unremarkable. A biopsy of the lesion shows nests of atypical deeply basophilic cells extending from the overlying epidermis into the papillary dermis. The nests show peripheral palisading of the cells with haphazard arrangement in the center. Which of the following descriptions of gross appearance corelate to the microscopic findings seen in this lesion? Answers A - E A Pearly nodule with telangiectasia B Purple, pruritic, and polygonal lesion C Rough sandpaper consistency lesion D Round flat, coin like waxy plaque E Salmon colored plaque with silvery white scales Oarrow_forwardPropionibacterium acnes is a normal member of the skin microbiome that benefits the body by lowering the skin's pH- an antimicrobial effect. However, P. acnes is also the leading cause of acne. Explain mechanistically how can a bacterium be part of the normal microbiome and beneficial but also be pathogenic?arrow_forward
- Bacteria have a single circular chromosome while human cells have 46 linear chromosomes. This means bacteria are considered half lloyd having only one copy of each gene.arrow_forwardThe man pictured in Figure 4.17 wears skin ornaments applied by piercing. Among other functions, the skin is a barrier to potentially dangerous bacteria, and some people object to extensive body piercing on the grounds that it opens the door to infections. Explain why you do or dont agree with this objection. Figure 4.17 This young man has chosen to undergo multiple body piercings.arrow_forwardPropionibacterium acnes is a normal member of the skin microbiome that benefits the body by lowering the skin's pH- an antimicrobial effect. However, P. acnes is also the leading cause of acne. Explain mechanistically how can a bacterium be normal and beneficial but also be pathogenic?arrow_forward
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