EBK CAMPBELL BIOLOGY IN FOCUS
2nd Edition
ISBN: 8220101459299
Author: Reece
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 solution
Students have asked these similar questions
Why are encapsolated bacteria generally more pathogenic than un-capsolated strains.
a. Because capsule allows the organism to hide in the body of the host.
b. because the capsule causes the phagocyte to mutate c. because the capsule protects bacteria from host immune cells
d. because the capsule kills the phagocytes
e. because the capsule stimulates a potent immune response in the host.
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?
Which antibiotic listed would be most effective against staph organisms?
Chapter 19 Solutions
EBK CAMPBELL BIOLOGY IN FOCUS
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
- Which antibiotic listed would be most effective against E Coli?arrow_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_forwardExplain why a tuberculin skin test on an AIDS (acquired immunodeficiencysyndrome) patient with tuberculosis may show a negative result.arrow_forward
- The 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_forwardIn a case study, scientists frequently infer that Malignant transformation of hymenolepis nana in human host occurred because of the patient’s HIV/AIDS status and resultant immunocompromised state. When N=1, is such an inference statistically justified? In addition to Yes or No, jot down your thoughts on the possible association between AIDS and this case.arrow_forwardWhich of the following statements is incorrect? a. Mucosal surfaces are better than skin surfaces at supporting colonization by commensal microorganisms. b. The skin provides a larger surface area than mucosal surfaces for commensal microorganisms. c. There are ten times as many bacteria residing in the intestinal tract than the number of cells in the human body. d. It is common for commensal bacteria to live in symbiosis with their human hosts. e. During gestation in mammals, a fetus does not have any commensal microorganisms on their skin or mucosal surfaces.arrow_forward
- All of the following can be side effects of antimicrobialagents EXCEPT:(a) “Superinfections” can occur with new pathogens whendefensive capacity of normal flora is destroyed(b) Host toxicity(c) Disruption of normal microflora in host(d) Host allergic reaction(e) Host “superimmunity”arrow_forward(a) Resistance of HIV in two patients, followed over time Patient 1 Patient 2 Months of therapy Months 100 of therapy 20 16 11 11 50 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 Concentration of AZT (µM) 37. The graph above shows the resistance of HIV at various concentrations of the antiviral drug, AZT over time. The results illustrate that: a. Every patient reacts the same to HIV b. Some patients have greater resistance to HIV than others c. Resistance to HIV increases over time d. Over time, HIV can become resistant to therapy. Resistance (% relative viability in presence of AZT)arrow_forwardApproximately 50% of the world’s population is colonised by Helicobacter pylori (H. pylori), yet only a fraction of the population develops gastric ulcers. A. Why is there a discrepancy between the frequency of H. pylori colonization and the frequency of gastric ulceration? Is H. pylori colonization responsible for gastric ulcers? B. Should a vaccine against H. pylori be developed and administered for everyone? Justify your reasoning.arrow_forward
- 3) Make the match with the terms and definitions Bioinert Undergoes degradation in the body and can be secreted naturally Bioactive Causing "no" biological effect/host response Biodegradable Produces an unexpected effect on living tissue 4) Which one of the below given properties belongs to second generation biomaterials ? a) Minimal reaction/interaction with the body b) stimulate specific cell responses at molecular level c) controlled reaction with the physiological enviroment d) Biointeractive and resorbablearrow_forwardDifferent strains of Streptococcus pyogenes have different virulence factors, giving these microbes much versatility. Virulence factors include which of the following? Choose one or more: A.A capsule that, when thick, will help the organism avoid phagocytosis by macrophages B.A cell wall containing lipoteichoic acid, thought to facilitate adherence to pharyngeal epithelial cells C.Enzymes that lyse blood cells (streptolysins) D.The production of several endotoxins called streptococcal pyogenic endotoxins (SPEs)arrow_forwardA patient admitted to the hospital for fever and coughing is diagnosed with an active tuberculosis infection, and is treated with an antibiotic named rifampin. The antibiotics seemed successful, and his subsequent tests for tuberculosis came back negative. However, he was re-admitted to the hospital two months later with similar symptoms, was treated with rifampin again, and died of respiratory failure shortly thereafter. It was concluded that he had been infected with an antibiotic-resistant strain of M. tuberculosis. Does this situation meet the criteria for evolution by natural selection? Briefly explain how each of Darwin’s postulates is met/not met: a. Individuals in a population vary in traits. b. Traits are heritable. c. More offspring are produced than can survive, and only some individuals survive and reproduce. d. Individuals with certain heritable traits are more likely to survive and reproduce than others.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
