Microbiology Fundamentals: A Clinical Approach
3rd Edition
ISBN: 9781259709227
Author: Marjorie Kelly Cowan Professor, Heidi Smith
Publisher: McGraw-Hill Education
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Chapter 11, Problem 20Q
Summary Introduction
To explain:
Possible reasons for the non-occurrence of the diseases in an animal model when the aerosol form of the bacterium is administered.
Concept introduction:
In this particular case, Koch’s postulates are being performed on sputum specimen which is taken from patients with the unexplained respiratory illness. An abundance of a specific kind of colony is observed on agar cultures. However, if the bacteria are administered in the aerosol form in a model organism, it does not cause disease.
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Chapter 11 Solutions
Microbiology Fundamentals: A Clinical Approach
Ch. 11.1 - Prob. 1AYPCh. 11.1 - Enumerate the sites where normal biota is found in...Ch. 11.1 - Discuss how the Human Microbiome Project is...Ch. 11.1 - Prob. 2NPCh. 11.2 - Differentiate between a microbes pathogenicity and...Ch. 11.2 - Prob. 5AYPCh. 11.2 - Explain the significance of polymicrobial...Ch. 11.2 - Prob. 7AYPCh. 11.2 - Prob. 8AYPCh. 11.2 - Prob. 9AYP
Ch. 11.2 - Prob. 10AYPCh. 11.2 - Prob. 11AYPCh. 11.2 - Draw a diagram of the stages of disease in a humanCh. 11.2 - Prob. 13AYPCh. 11.2 - Prob. 14AYPCh. 11.2 - Define healthcare-associated infection, and list...Ch. 11.2 - Prob. 16AYPCh. 11.2 - Prob. 1MMCh. 11.2 - Prob. 3NPCh. 11.2 - Prob. 2MMCh. 11.2 - Prob. 4NPCh. 11.2 - Prob. 5NPCh. 11.2 - Q. Can you think of what type of incident might...Ch. 11.2 - Prob. 6NPCh. 11.3 - Summarize the goals of epidemiology, and...Ch. 11.3 - Prob. 18AYPCh. 11.3 - Prob. 19AYPCh. 11.3 - Discuss the three major types of epidemics, and...Ch. 11 - Prob. 1NPCh. 11 - Prob. 1QCh. 11 - Prob. 2QCh. 11 - Prob. 3QCh. 11 - Prob. 4QCh. 11 - Prob. 5QCh. 11 - Discuss the role of endospores in ensuring the...Ch. 11 - Prob. 7QCh. 11 - Correlate the stages in the course of an...Ch. 11 - Prob. 9QCh. 11 - Prob. 10QCh. 11 - Prob. 11QCh. 11 - Prob. 12QCh. 11 - Prob. 13QCh. 11 - Prob. 14QCh. 11 - Prob. 15QCh. 11 - Prob. 16QCh. 11 - Prob. 17QCh. 11 - Prob. 18QCh. 11 - The number of cases, including new cases as well...Ch. 11 - Prob. 20QCh. 11 - One important way to critically analyze a study...Ch. 11 - Prob. 1VC
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- Note that it is not appropriate to self-diagnose outside of a medical context and this is a completely hypothetical scenario. Imagine you have a rash on your foot. You're concerned that it's an infection and inoculate a sample onto an agar plate. You wonder, How can I figure out whether the pathogen is a bacterium vs a eukaryote? You decide to use lab supplies to get a basic understanding of the pathogen. Be specific about what tests you use and what you expect the results to be. Limit yourself to experiments we could do in our lab. What is one experiment you could do, involving culturing the organism?arrow_forwardNote that it is not appropriate to self-diagnose outside of a medical context and this is a completely hypothetical scenario. Imagine you have a rash on your foot. You're concerned that it's an infection and inoculate a sample onto an agar plate. You wonder, How can I figure out whether the pathogen is a bacterium vs a eukaryote? You decide to use lab supplies to get a basic understanding of the pathogen. Be specific about what tests you use and what you expect the results to be. Limit yourself to experiments we could do in our lab. What is a procedure you could do, involving making a slide of the organism?arrow_forwardpropose a hypothesis regarding the organisms (staphylococcus, escherichia, pseudomonas, and bacillus) that will be resistant to the most disinfectants, and why? if the hypothesis is supported, what specific experimental results will be observed? what would be the independent and dependent variable? zone size, disinfectant type, colony countarrow_forward
- Describe the purpose of identifying unknown bacterial cultures in medical field. Name the step by step experiments/procedures that microbiologists follow in order to identify microorganisms.arrow_forwardIn a series of infection experiments, a researcher discovers that the ID50 value for the infectious bacterium Parasiticum mucoides is 100, and that the ID50 for another infectious bacterium, Donoteatum thisbacterium, is 15,000. Given these data, a person exposed to 1,000 bacteria of each type would be more likely to be infected by which bacterium? Group of answer choices There is no way to know given the information provided Both infections are equally likely Parasiticum mucoides Donoteatum thisbacteriumarrow_forwardDescribe the purpose of identifying unknown bacterial culture in medical field. Name the step by step experiments/procedures that microbiologists follow in order to identify microorganisms.arrow_forward
- A lab technician is working with a bacterium in pure culture (in 5 ml of liquid media in a test tube). The bacterium is a mesophile that can infect humans. Which of the following is NOT true (with regards to temperature conditions for this bacterial culture)? Lowering the temperature to -10 deg C for at least an hour will likely kill all the bacteria. Placing the tube at 37 deg C will likely facilitate rapid growth of the bacteria. Raising the temperature to 90 deg C for at least an hour will likely kill all the bacteria. Placing the tube at 4 deg C will likely slow or halt growth of the bacteria.arrow_forwardName two or more situations where Koch’s postulates are impossible to complete? In other words, what factors about a microbe or factors about a disease make it impossible for Koch's postulate to be performed with that microbe or disease?arrow_forwardthe following are the steps, listed in random order, for utilizing koch's postulates. what should be the second step out of the four listed? a. a microorganism is found to be present in every case of a disease. b. the same microbe discovered previously is isolated from the purposely infected host c. the pathogen is isolated and grown in pure culture d. the same disease results after isolated organism is inoculated into healthy hostarrow_forward
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