NESTER'S MICROBIOLOGY
9th Edition
ISBN: 9781264826940
Author: Anderson
Publisher: MCG
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Chapter 16, Problem 2SA
Describe two situations that can lead to changes in the composition of a person's microbiome.
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Explain how specialized structures (e.g., spore, capsule, fimbriae, or flagella) enable a microbe to survive in a given environment or contribute to pathogenesis.
Social environments influence multiple traits of individuals including immunity, stress and ageing, often in sex-specific ways. The composition of the microbiome (the as- semblage of symbiotic microorganisms within a host) is determined by environmental factors and the host's immune, endocrine and neural systems. The social environ- ment could alter host microbiomes extrinsically by affecting transmission between individuals, probably promoting homogeneity in the microbiome of social partners. Alternatively, intrinsic effects arising from interactions between the microbiome and host physiology (the microbiota-gut-brain axis) could translate social stress into dysbi- otic microbiomes, with consequences for host health. We investigated how manipu- lating social environments during larval and adult life-stages altered the microbiome composition of Drosophila melanogaster fruit flies. We used social contexts that par- ticularly alter the development and lifespan of males, predicting that…
Explain how microbiota from different environments may affect human health.
Chapter 16 Solutions
NESTER'S MICROBIOLOGY
Ch. 16 -
1. Describe three types of symbiotic...Ch. 16 -
2. Describe two situations that can lead to...Ch. 16 -
3. How are acute, chronic, and latent infections...Ch. 16 - Prob. 4SACh. 16 - Describe the four general mechanisms by which...Ch. 16 - Describe two mechanisms that bacteria use to...Ch. 16 - Explain how a capsule can allow an organism to be...Ch. 16 - Prob. 8SACh. 16 -
9. Describe two mechanisms a virus might use to...Ch. 16 -
10. How do Schistosoma species avoid antibodies?
Ch. 16 - Prob. 1MCCh. 16 - Prob. 2MCCh. 16 - The C5a peptidase enzyme of Streptococcus pyogenes...Ch. 16 - Prob. 4MCCh. 16 - Prob. 5MCCh. 16 - Prob. 6MCCh. 16 - Prob. 7MCCh. 16 - Prob. 8MCCh. 16 - Prob. 9MCCh. 16 -
10. Which of the following statements about...Ch. 16 - A group of smokers suffering from Staphylococcus...Ch. 16 - Prob. 2ACh. 16 - Prob. 1CTCh. 16 - Prob. 2CT
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- Select all of the following that applies to the tradeoff between transmission and virulence that applies to many diseases. a) The tradeoff between transmission and virulence means that diseases always evolve to become more virulent. b) If greater virulence limits transmission, that disease will likely evolve to become less virulent than it could be. c) While making more copies of itself can increase the likelihood of transmission occurring, too much replication of the disease can make the host so sick it won't leave the house and spread the disease. d) A strain of a disease that replicates enough to be transmitted, but not so much that the host gets too sick to move, will be favored by natural selection over strains that either make the host too sick or do not replicate enough to be transmitted. e) If a disease can spread without making its host sick (e.g. when the host is asymptomatic), then the tradeoff between transmission and virulence…arrow_forwardDescribe the different ways a disease can be transmitted? What impact do we have as human that can support the control of transmission? What tactics, skills and/or techniques will you implement going forward to help control the transmission of microbes in your daily life?arrow_forwardPathogenic microbes that cause disease in health care settings fall under which category of organisms? O 1) Normal flora O 2) True pathogens O 3) opportunists 3) O 4) Nosocomialarrow_forward
- Is the human microbiome the key to our health? Explain briefly.arrow_forwardWhich of the following is a difference between transient and resident microbiota? Transient microbiota are pathogenic, and resident microbiota are not. Resident microbiota remain on the host for an extended period. Humans do not have transient microbiota. Transient microbiota can be opportunistic pathogens, and resident microbiota cannot. Resident microbiota cause disease and transient microbiota do not.arrow_forwardNormal microbiota provide protection from infection in each of the following ways EXCEPT: Question 3 options: A) they produce antibacterial chemicals. B) they compete with pathogens for nutrients. C) they make the chemical environment unsuitable for nonresident bacteria. D) they produce lysozyme.arrow_forward
- What is a microbiome? What is the human microbiome and how is it important to human health? What do we know about the human microbiome in general? Provide a general introduction to these topics and make sure to emphasize the importance of the microbiome.arrow_forwardInfections in the blood and circulatory system tend to be more dangerous because they are not localized to one specific area. a) True b) Falsearrow_forwardWhat is epidemiology? there are several ways pathogens can be transmitted including direct contact, indirect contact, via respiratory droplets, vehicle, and through a vector. Describe each mode IN DETAIL and give an example of a pathogen that can be transmitted each way.arrow_forward
- Which one of the following is not correct? * a) Biocompatibility is the ability of a material to perform within an appropriate host response. b) Bioactivity is the characteristic that not allows the material to form a bond with living tissue c) Biodegradability is the breakdown of O the implant due to chemical or cellular interaction. O d) all of abovearrow_forward5)How does the rate of disease transmission vary with the distribution of individuals? a)Population b)Community c)Ecosystemarrow_forwardWhich of the following virulence factors among A-D is correctly matched with its definition or characterization? A) O Invasins: pathogen proteins that prevent opsonization of the pathogen B) O Phase variation: allows pathogen to switch between different forms of an extracellular antigen (e.g., flagellum) C) O Protein A. a microbial factor that allows for attachment, typically a surface protein or surface glycoprotein D) O Prevention of lysosome:phagosome fusion mechanism employed by an extracellular pathogen E) OM protein, Opa protein: enzymes that interfere with the functioning of antibodiesarrow_forward
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