Nester's Microbiology: A Human Perspective
9th Edition
ISBN: 9781259709999
Author: Denise G. Anderson Lecturer, Sarah Salm, Deborah Allen
Publisher: McGraw-Hill Education
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Chapter 20, Problem 2A
Summary Introduction
To review:
The reason as to why scientists have criticized the low dosage of antibiotics for the growth of cattle and chickens. Also, give a reason as to why the producers are reluctant to stop this movement.
Introduction:
Antibiotic resistance is a serious emerging problem worldwide. The use of antimicrobials in low dosage can promote the growth of the cattle and chickens. The producers are reluctant about the fact that the use of low dosage of antibiotics is leading to the selection of resistant species of the organisms.
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Chapter 20 Solutions
Nester's Microbiology: A Human Perspective
Ch. 20 - Describe the difference between the terms...Ch. 20 -
2. Define therapeutic index and explain its...Ch. 20 -
3. Explain how penicillin-binding proteins (PBPs)...Ch. 20 - Name three classes of antimicrobial medications...Ch. 20 - Explain the roles of the first-line drugs versus...Ch. 20 -
6. Compare and contrast the method for...Ch. 20 - Name three targets that can be altered...Ch. 20 - What is MRSA? Why is it significant?Ch. 20 - Prob. 9SACh. 20 -
10. Explain the difference between the mechanism...
Ch. 20 - Which of the following targets would you expect to...Ch. 20 -
2. Penicillin has been modified to make...Ch. 20 -
3. Which of the following is the target of...Ch. 20 -
4. Which of the following statements is false?
a)...Ch. 20 - Prob. 5MCCh. 20 - Prob. 6MCCh. 20 - Prob. 7MCCh. 20 - Prob. 8MCCh. 20 - Prob. 9MCCh. 20 - Prob. 10MCCh. 20 - Prob. 1ACh. 20 - Prob. 2ACh. 20 - Prob. 1CTCh. 20 - Prob. 2CT
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- So is it fair to say that #1 treatment 1 has steady growth treatment 2 has stead growth treatment 3 has steady growth treatment 4 has very little growth treatment 5 has some growth treatment 6 steady growth #2 The carbon dioxide provided a good amount of growtharrow_forwardMicrobes that can be grown on agar petri dish include A. Bacteria B. Virus C. Fungi D. Protests E. Helminths.arrow_forwardImagine that you have set up a Kirby Bauer experiment on Mueller Hinton agar (non-selective agar) in order to test if Escherichia coli is susceptible or resistant to Drug X. After 24 hours, you notice a zone of inhibition (clear zone) around your antibiotic disc and determine that E. coli is susceptible to Drug X. You then take a cotton swab and subculture a sample from this zone of inhibition (where no growth was apparent) onto a new agar plate without antibiotics and after 24 hours you see growth of E.coli. What can you conclude about Drug X?arrow_forward
- Describe the interactions of Agrobacterium tumefaciens with its host plant. Why is this plant pathogen useful for biotechnology?arrow_forwardI want clear handwritten solution only....i will up votearrow_forwardThis diagram shows the filter paper method used to evaluate the inhibitory effect of chemical agents, heavy metals, and antibiotics on bacterial growth. A culture of a test bacterium is spread uniformly over the surface of an agar plate. Small filter paper discs containing the material to be tested are then placed on the surface of the medium. A disc that has been soaked in sterile distilled water is sometimes added as a control. After incubation, a lawn (film of growth) will cover the plate, but a clear zone will surround those discs that contain an inhibitory compound. The size of the zone reflects several factors, one of which is the effectiveness of the inhibitory agent. What are two other factors that might affect the size of the zone of inhibition? What is the purpose of the control disc? If a clear area were apparent around the control disc, how would you interpret the observation?arrow_forward
- Microbes can be used to decrease the use of chemical fertilisers and pesticides.Explain how this can be accomplishedarrow_forwardDo you think the United States can accomplish changes in how antibiotics are used in animal agriculture like those seen in Denmark? Why or why not? What are the main barriers to minimizing or ending antibiotic misuse in animal agriculture in the United States? How could these barriers be addressed?arrow_forwardWhy are antibiotics used in livestock production?arrow_forward
- The size of the inhibition zone depends on conditions such as: Multiple Choice The concentration of the antibiotic loaded onto the disk The solubility of the antibiotic availability of moisture The concentration of the antibiotic loaded onto the disk AND the solubility of the antibioticarrow_forwardIf you spread one agar plate with a lawn of staphylococcus epidermis and the other with a virulent and contagious pathogen, would you expect to see the zone of inhibition around antibiotic x bigger or smaller or the same around the pathogen as around the staphylococcus?arrow_forwardThe results of Figure 2 highlights the antibacterial activity of cacay oil. Since the method involves adding cacay oil to a "broth" medium, it can be inferred that cacay oil is hydrophilic. Agree or Not?arrow_forward
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