CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
3rd Edition
ISBN: 9780135191811
Author: Urry
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 19, Problem 3TYU
Summary Introduction
Introduction:
“Methicillin-resistant Staphylococcus aureus” ( MRSA) is a resistant strain of Staphylococcus aureus. Methicillin is similar to the penicillin. It acts on Staphylococcus aureus that results in the lethality of bacteria. Due to mutation, the bacterium Staphylococcus aureus became resistant toward the antibiotics.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Observe the results from a disc-diffusion experiment below. Which antibiotic would you prescribe to a patient with a similar Staphylococci infection? The patient has no known allergies or contraindications for broad-spectrum antibiotics. Remember to use the table above to determine if the bacteria are resistant, susceptible or intermediate.
a. Tetracycline
b. Streptomycin
c. Penicillin
d. Norfloxacin
During the anthrax crisis of 2001, public health officials urged citizens not to take the antibiotic ciprofloxacin as a preventative measure. Public health officials were concerned that overuse of ciprofloxacin would lead to resistant varieties of anthrax and other bacterial pathogens. Ciprofloxacin is one of the few readily available antibiotics that can treat anthrax.
1)Do you think that public health officials should more directly regulate the availability of ciprofloxacin to ensure its proper use?
2)Why?
During this outbreak, some people sickened with listeriosis testedpositive for Listeria monocytogenes in their bloodstream, but a DNAprofile of the bacterium showed that it was not the outbreak strain.What likely conclusion can be drawn from this information?a. It is a false positive.
b. The person is not part of the outbreak.c. Listeria monocytogenes mutates frequently, making DNAprofiling unreliable.d. The person has already begun to recover from the disease.
Chapter 19 Solutions
CAMPBELL BIOLOGY IN FOCUS-MOD.MASTERING
Ch. 19.1 - How did Huttons and Lyells ideas influence Darwins...Ch. 19.1 - MAKE CONNECTIONS Scientific hypotheses must be...Ch. 19.2 - How does the concept of descent with modification...Ch. 19.2 - Prob. 2CCCh. 19.2 - MAKE CONNECTIONS Review the relationship between...Ch. 19.3 - Explain how the following statement is inaccurate:...Ch. 19.3 - How does evolution account for (a) the similar...Ch. 19.3 - WHAT IF? Fossils show that dinosaurs originated...Ch. 19 - Which of the following is not an observation or...Ch. 19 - Which of the following observations helped Darwin...
Ch. 19 - Prob. 3TYUCh. 19 - The upper forelimbs of humans and bats have fairly...Ch. 19 - DNA sequences In many human genes are very similar...Ch. 19 - SCIENTIFIC INQUIRY DRAW IT Mosquitoes resistant to...Ch. 19 - FOCUS ON EVOLUTION Explain why anatomical and...Ch. 19 - FOCUS ON INTERACTIONS Write a short essay (about...Ch. 19 - SYNTHESIZE YOUR KNOWLEDGE This honeypot ant (genus...
Knowledge Booster
Similar questions
- Penicillin was first used in the 1940s to treat gonorrhea infections produced by the bacterium Neisseria gonorrhoeae. In 1984, according to the CDC, fewer than 1% of gonorrhea infections were caused by penicillin-resistant N. gonorrhoeae. By 1990, more than 10% of cases were penicillin resistant and a few years later the level of resistance was 95%. Explain the various ways this resistance could be spread among the cells. Could this resistance pass to other infectious bacteria from N. gonorrhoeae?arrow_forwardSome strains of Escherichia coli bacteria have acquired the ability to produce the harmful Shiga toxin, normally produced by Shigella dysenteriae. Which statements best explain why this occurs? Mark all that apply. A. conjugation between two different species of bacteria allowed both strains of bacteria to express a virulence factor B. transformation resulted in expression of a virulence factor C. horizontal gene transfer between different species of bacteria D. transduction of a specific gene resulted in expression of new traitsarrow_forwardWhich of these antibiotics would do the best job as a broad spectrum antibiotic?arrow_forward
- An elderly man with influenza acquires a case of pneumonia. Gram-positive cocci isolated from his sputum give beta-hemolysis on blood agar. The infection is very difficult to treat. Later, it is shown that the man shared the room with a patient with bone infection. Isolates from both infections were the same. a. Describe 2 biochemical tests that can be used for the definitive diagnosis. b. Describe 2 virulence factors of this pathogen and implicate them in diseases.arrow_forwardThe first step for directly linking a microbe to a specific disease according to Koch's postulates is to A.isolate microbes from the blood of healthy animals. B. culture the blood or other body fluid from a diseased animal using nutrient medium. C. inject a sample of blood or other body fluid from a diseased animal into a healthy animal. D. obtain a sample of blood or other body fluid from a diseased animal.arrow_forwardAn infectious dose of several million cells in enteric infections seems like a lot. a. In terms of the size and abundance of microbes, could you see a cluster containing that many cells with the naked eye? b. About how long would it take an average bacterial species to reach the infectious dose of a million cells starting from a single cell? c. Why do enteric diseases require a relatively higher infectious dose than nonenteric diseases? d. Explain why antimicrobic therapy used on gram-negative bacterial infections could actually lead to illness rather than cure itarrow_forward
- Why antibacterial drugs are ineffective against: A. Fungal Infections B. Viral infections C. Helminthic worm infectionsarrow_forwardWhat is the specific mode of action and the target organisms of each of the three antibiotics used in the exercise (isolation of E. coli bacteriophage)?a. Ampicillin:b. Polymyxin:c. Streptomycin:arrow_forwardTransformation of mammalian cells with viruses and obtaining mammalian cells harboring the virus is a method used to maintain the virus of interest. During this process what are the plaques observed? A. Clear areas in a layer of cultured cells degenerated and lysed due to virus infection. B. Stained areas in a cell culture indicating cells infected by a virus. C. Virus colonies on agar. D. Bacterial colonies on agararrow_forward
- 1.Based on the experience of the Philippines with the dengue vaccine, what can you conclude regarding the Dengvaxia Case? -arrow_forwardThe five stages of the bacteriophage lytic cycle occur in this order:a. penetration, attachment, release, maturation, biosynthesis.b. attachment, penetration, release, biosynthesis, maturation.c. biosynthesis, attachment, penetration, maturation, release.d. attachment, penetration, biosynthesis, maturation, release.e. penetration, biosynthesis, attachment, maturation, release.arrow_forwardWith some level of toxic shock syndrome caused by the superantigen produced by Staphylococcus aureus, why the antibiotics are not effective after a certain point, even though the pathogen is susceptible to them?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you