What are Koch's postulates and what are they used for? Give an example of a modern...

What are Koch's postulates and what are they used for? Give an example of a modern exception to each postulate.

Expert Solution

Four criteria by Robert Koch to identify the causative agent of a particular disease, these include:

the microorganism or other pathogen must be present in all cases of the disease
the pathogen can be isolated from the diseased host and grown in pure culture
the pathogen from the pure culture must cause the disease when inoculated into a healthy, susceptible laboratory animal
the pathogen must be reisolated from the new host and shown to be the same as the originally inoculated pathogen

Exceptions

1 .Some microbes are obligate intracellular parasites (like chlamydia or viruses) and are very challenging, or even impossible, to grow on artificial media.

2. Some diseases, such as tetanus, have variable signs and symptoms between patients.

3. Some diseases, such as pneumonia & nephritis, may be caused by a variety of microbes.

4. Certain pathogens, such as HIV, cause disease in humans only -- it is unethical to purposefully infect a human.

5

gladiator answered 1 year ago

Explain how Koch's postulates could be used to identify SarsCoV-2 as the causative agent of COVID-19....

Explain how Koch's postulates could be used to identify SarsCoV-2 as the causative agent of COVID-19. Be sure to identify all of Koch's postulates in your answer. Explain two challenges you might encounter.

Which of the following would make Koch's postulates impossible or difficult to fulfill in David's case?...

Which of the following would make Koch's postulates impossible or difficult to fulfill in David's case? Select all that apply. View Available Hint(s) Hint 1. Koch's postulates are used to definitively prove that an organism is causing a disease. Which of the following would make Koch's postulates impossible or difficult to fulfill in David's case? Select all that apply. The infectious agent cannot be grown in the hospital lab. The infectious agent could not be stained. The infectious agent only...

What is meant by spectroscopy in modern physics? Give an example of an experimental result

1. Describe Koch's postulates and how they pertain to germ theory. 2. Explain how host behavior...

1. Describe Koch's postulates and how they pertain to germ theory. 2. Explain how host behavior can impact susceptibility to disease. 3. In your opinion, which is the most important characteristic of microscopy when viewing a microbe, magnification, resolution, or contrast? Explain.

Modern versus classical Sport What role does techonolgy play in modern sport? Give an example of...

Modern versus classical Sport What role does techonolgy play in modern sport? Give an example of modern sport that relies on technology and speculate on the historical beginnings of that particular sport before such technology.

What is a coverage ratio? Give an example. How is it used?

What is CreERT2? Give an example of how it can be used

Morphospecies Concept Clade Synapomorphy Allopatry Phylogeny Nodes Sister Group's Microbiome Pathogens Koch's Postulates Enrichment Culture Metagenomics...

Morphospecies Concept Clade Synapomorphy Allopatry Phylogeny Nodes Sister Group's Microbiome Pathogens Koch's Postulates Enrichment Culture Metagenomics Endosymbiosis Phagocytosis Pseudopodia A. Used to catalog all the genes present in a mixed community of prokaryotes B. used in modified form to confirm a causative link between new diseases and a suspected infectious agent C. represent hypothetcal common ancestors before splitting events D. a trait that is found in certain groups of organisms and their common ancestor but is missing in more...

Give an example of a modern day tragedy of the commons. Should there be any government...

Give an example of a modern day tragedy of the commons. Should there be any government intervention in the use of common resources and what would the consequences be if there were no government intervention in these circumstances? If government should intervene, how would you recommend that they solve the problem? Please yse at least 400 words.

How can Koch’s postulates be used to test for infection? What are the limitations of these...

How can Koch’s postulates be used to test for infection? What are the limitations of these postulates?

Question