Microbiology: An Introduction
12th Edition
ISBN: 9780321929150
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: PEARSON
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Textbook Question
Chapter 20, Problem 4MCQ
An antimicrobial agent should meet all of the following criteria except
- a. selective toxicity.
- b. the production of hypersensitivities.
- c. a narrow spectrum of activity.
- d. no production of drug resistance.
- e. none of the above
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Chapter 20 Solutions
Microbiology: An Introduction
Ch. 20 - DRAW IT Show where the following antibiotics work:...Ch. 20 - List and explain five criteria used to identify an...Ch. 20 - What similar problems are encountered with...Ch. 20 - Define drug resistance. How is it produced? What...Ch. 20 - List the advantages of using two chemotherapeutic...Ch. 20 - Why does a cell die from the following...Ch. 20 - How does each of the following inhibit...Ch. 20 - The OH is missing from carbon 39 in ddI. How does...Ch. 20 - Compare the method of action of the following...Ch. 20 - NAME IT This microorganism is not susceptible to...
Ch. 20 - Which of the following pairs is mismatched? a....Ch. 20 - Prob. 2MCQCh. 20 - Prob. 3MCQCh. 20 - An antimicrobial agent should meet all of the...Ch. 20 - The most selective antimicrobial activity would be...Ch. 20 - Prob. 6MCQCh. 20 - Which of the following will not affect eukaryotic...Ch. 20 - Cell membrane damage causes death because a. the...Ch. 20 - A drug that intercalates into DNA has the...Ch. 20 - Chloramphenicol binds to the 50S portion of a...Ch. 20 - Prob. 1ACh. 20 - Why is idoxuridine effective if host cells also...Ch. 20 - Some bacteria become resistant to tetracycline...Ch. 20 - The following data were obtained from a...Ch. 20 - Prob. 5ACh. 20 - The following results were obtained from a broth...Ch. 20 - Vancomycin-resistant Enterococcus faecalis was...Ch. 20 - Prob. 2CAECh. 20 - Prob. 3CAE
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- Please choose all the ADVANTAGES of protein-based drugs such as antibodies compare to small molecules from the following options. A. high selectivity B. Biocompatibility C. stable to metabolism D. oral bioavailability E. long half-life F. high activityarrow_forwardWhen two antimicrobial drugs are used at the same time, antagonistic effects can occur. Which of the following is NOT a possible antagonistic effect of combining two antimicrobial drugs? Increased elimination of one drug Increased activity of both drugs Increased toxicity Decreased therapeutic levels Decreased activity of both drugsarrow_forwardBroad-spectrum drugs target a wide variety of bacterial pathogens. Even when the broad-spectrum drug is capable of killing a target pathogen, it may not be the best treatment. Which statement best explains why a broad spectrum drug might be an undesirable treatment choice? Broad-spectrum antimicrobials are usually toxic to the host cells. Broad-spectrum antimicrobials only work if they are used shortly after the infection begins. Broad-spectrum antimicrobials may kill much of the normal microbiota. Broad-spectrum antimicrobials are not able to kill bacteria that are in their log phase of growth. Broad-spectrum antimicrobials may stimulate excess growth of the normal microbiota.arrow_forward
- List 10 characteristics of an ideal antimicrobial drug.arrow_forwardWhich of the following is NOT a property of an antimicrobial agent? a. Must have a known concentration over a period of time required to eliminate a pathogen b. all choices are correct c. must be selectively toxic d. Must have a favorable chemotherapeutic indexarrow_forwardThere are many bacterial-antimicrobial resistance combinations. Which one of the following is of maior international concern? a. Sulfonamide resistance in Neisseria meningitides b. Penicillin G resistance in N. gonorrhoeae C. Ampicillin resistance in H. influenza d. Erythromycin resistance in S. pyogenes (group A streptococci) e. Vancomycin resistance in S. aureusarrow_forward
- explain how the different targets of antimicrobial drugs work in relation to selective toxicity.arrow_forwardBelow, you can see a picture of an antimicrobial drug. Regarding semi-synthetic antimicrobial drug development to try to avoid development of antibiotic resistance, use 1 sentence to address what is the significance/value of the presence of the various R-groups (e.g. R4, R5, R6, etc.)?arrow_forwardWhich of the following medication doses are calculated by using the area under the curve method? A. Carboplatin B. Dacarbazine C. Ifosfamide D. Cyclophosphamidearrow_forward
- Which of the following is a criteria used to evaluate an antibiotic? Which of the following is a characteristic or criterion used to evaluate an antibiotic? The answer can be one or more) Select one or more: O a. should not interfere with host defense mechanisms O b. should not kill normal host flora O c. must remain active even in the presence of organic matter O d. show selective toxicityarrow_forward. .arrow_forwarddescribe four modes of action of antimicrobial agents, and give a specific example of how each worksarrow_forward
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