Which of the following are criteria for antibiotics? (select all that apply) Chemical substance produced by a microbe Kills viruses Stops the growth or kills other microorganisms Effective in small doses
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- Many visits to your physician do not result in a culture or a drug-test of the causative infectious agent, yet you still leave with a prescription for antibiotics. Name one instance where it would be best to be prescribed a narrow spectrum antibiotic. Name a second instance where it would be best to be prescribed a broad spectrum antibiotic.Some bacteria produce the enzyme penicillinase, which breaks the beta-lactam ring in the penicillin molecule and converts it into penicilloic acid, which is harmless to bacteria. This is an example of which of the following mechanisms of antibiotic resistance? which option below is the answer? Destruction or inactivation of the antibiotic by the microbe Preventing penetration to the target site within the microbe Alteration of the drug’s target site(s) within the microbe None of the other four answers are correct Rapid ejection (pumping) of the drug out of the microbial cellwhich of the following antibiotics is not bactericidal? a. vancomycin b.polymyxin b c. penicillin d. cephalosporins e. tetracycline
- Which antimicrobial agents have the narrowest spectrum of action? antivirals antifungals beta-lactams sulfanilamidesBottom of Form Penicillin is a narrow spectrum antibiotic because it only affects bacteria with mycolic acid in its cell wall, such as Mycobacterium tuberculosis. it only affects viruses it only affects Gram-negative organisms it only affects Gram-positive organismsBottom of Form Which of the following antibiotics might be destroyed by beta-lactamase enzymes? amphotericin B and ciprofloxacin streptomycin penicillin ciprofloxacinBottom of Form Which is incorrect about how the pharmaceutical industry has discovered drugs over the past 100 years? The process of discovery has involved custom-designing chemical compounds that we know will bind to target enzymes. The process of discovery has involved screening for chemicals that are toxic to bacteria while being less toxic to human cells. The process of discovery has involved screening thousands of randomly…A narrow spectrum antibiotic against Gram –‘s might target the ____________ whereas narrow spectrum drugs against Gram +’s might target the ______________. Select one: a. Cell Wall/Cell Membrane b. Cell Wall/Protein Synthesis c. Cell Membrane/Protein Synthesis d. None of the Above e. Cell Membrane/Cell WallTechnically speaking, true antibiotics are drugs… A. Produced naturally by microbes B. Taken orally, not injected. C. Used to treat any microbial infection D. Used to treat any bacterial disease.
- Which of the following is an example of a noncommunicable infectious disease? infection with a respiratory virus food poisoning due to a preformed bacterial toxin in food skin infection acquired from a dog bite infection acquired from the stick of a contaminated needleTo prevent superinfections, a treatment plan should target only the bacteria causing the initial infection. increase the growth of the host microbiota. target gram-negative and gram-positive bacteria. cause wide-spread denaturing of proteins. eliminate all bacteria in the host.Which of the following factors is NOT significant in determining the effectiveness of a microbial treatment? Group of answer choices The toxins secreted by the microbe being treated. The susceptibility of the microbe to the treatment. The concentration of the treatment. The length of exposure to the treatment
- Is a viral infection treatedwith the same kind of drugthat treats bacterialinfections?Which of the following mechanisms of action of antibiotics has the fewest side effects? protein synthesis cell wall synthesis DNA replication synthesis of essential metabolites enzymatic activityNote 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?
