Very often, the invasion of hosts by pathogenic microbes leads to infections. Discuss the different means microorganisms use to enter and colonize a host.
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Very often, the invasion of hosts by pathogenic microbes leads to infections.
Discuss the different means microorganisms use to enter and colonize a host.
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Solved in 2 steps
- Explain how specialized structures (e.g., spore, capsule, fimbriae, or flagella) enable a microbe to survive in a given environment or contribute to pathogenesis.What 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.Below are a list of virulence factors/ strategies paired with an example of an organism that utilizes them. How do each of the following strategies contribute to the virulence of the pathogen? Strategy - Causes the host to produce more receptors (Organism - Rhinovirus) Strategy - Produces gas as a product of fermentation (Organism - Clostridium perfringens) Strategy - Produces a capsule (organism - Klebsiella pneumonia) Strategy - Ability to move between adjacent cells (organism - Cytomegalovirus) Strategy - Ability to use pilus as a motility structure (organism - Pseudomonas aerogenosa)
- Which of the following is a reason that specific pathogens tend to infect specific tissues? Most tissues are resistant to microbial exotoxins There are chemical and physical differences between tissues. Microbes preferentially target external tissues, such as skin, as the environment is more favorable for their growth than inside the body. Tissues with neutral pH are colonized but those with acidic or alkaline pH are not.Pathogenic 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) NosocomialPlease discuss pathogenicity and the mechanisms by which microorganisms can attack the human body.
- Describe 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?Which of the following types of antimicrobial drugs make microbes more susceptible to osmotic pressure? 1) drugs that inhibit nucleic acid synthesis O 2) drugs that inhibit metabolic pathways 3) drugs that inhibit cell wall synthesis 4) drugs that block a pathogen's recognition of its host 5) drugs that inhibit protein synthesisNormal 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.
- Match the periods of disease with their characteristics: incubation period prodomal period period of illness period of decline period of convalenscence Word bank - pathogen begins to decline in number and symptoms begin to abate - signs and symptoms of illness are obvious and severe - initial signs and symptoms of illness begin to present - host recovers and returns to a general state of health - pathogen begins to establish itself in the host, but no signs or symptoms are presentDescribe the difference between the terms INFECTION and DISEASE. Starting with exposure to pathogens, describe IN DETAIL the steps involved in the infection process ( exposure, adherence, invasion and multiplication) as well as the disease process( Toxicity, invasiveness, tissue or system damage)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…
