Microbiology With Diseases By Taxonomy (6th Edition)
6th Edition
ISBN: 9780134832302
Author: Robert W. Bauman Ph.D.
Publisher: PEARSON
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Chapter 10, Problem 2MC
Summary Introduction
Introduction:
To devise an effective treatment for the infectious disease, the determination of antimicrobial agent which is most effective against a specific pathogen is necessary. Various tests are there to test the effectiveness of antimicrobials like minimum inhibitory concentration test, diffusion susceptibility tests, and the minimum bactericidal test.
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In the Kirby-Bauer test, which of the following must be consistent?
a. concentration of bacteria placed on the plate
b. type of medium in the plate
c. concentration of antimicrobial drug in the disk
d. all of these
Which one of the following methods of antimicrobial susceptibility testing requires a dilution series of the antibiotic and
can provide a minimum inhibitory concentration?
Select one:
a. Disk diffusion method
b. Broth microdilution method
c. Agar macrodilution method
d. Gradient diffusion method
The Kirby -Bauer antimicrobial sensitivity testing method relies on:
A. The inhibition of one antimicrobial by another
B. The diffusion of antimicrobials in paper discs
C. Serial dilutions of antimicrobials in test tubes
D. A gradient of an antimicrobial on a paper strip
Chapter 10 Solutions
Microbiology With Diseases By Taxonomy (6th Edition)
Ch. 10 - Prob. 1TMWCh. 10 - Some antimicrobial drugs are harmful to humans....Ch. 10 - Prob. 3TMWCh. 10 - Why is it incorrect to say that an individual...Ch. 10 - Prob. 1CCSCh. 10 - Prob. 1EDCSCh. 10 - Prob. 1MCCh. 10 - Prob. 2MCCh. 10 - Prob. 3MCCh. 10 - Which of the following statements is relevant in...
Ch. 10 - Prob. 5MCCh. 10 - Multiple-drug-resistant microbes _____. a. are...Ch. 10 - Prob. 7MCCh. 10 - Prob. 8MCCh. 10 - Prob. 9MCCh. 10 - What specific test for antimicrobial efficacy is...Ch. 10 - What characteristics would an ideal...Ch. 10 - Contrast narrow-spectrum and broad-spectrum drugs....Ch. 10 - Why is the fact that drug Z destroys the NAM...Ch. 10 - Prob. 4SACh. 10 - Prob. 6SACh. 10 - Prob. 7SACh. 10 - Prob. 8SACh. 10 - Compare and contrast the actions of polyenes,...Ch. 10 - Prob. 10SACh. 10 - Prob. 1CTCh. 10 - Prob. 2CTCh. 10 - Prob. 3CTCh. 10 - Prob. 4CTCh. 10 - Prob. 5CTCh. 10 - Even though aminoglycosides such as gentamicin can...Ch. 10 - Prob. 7CTCh. 10 - Prob. 8CTCh. 10 - Prob. 9CTCh. 10 - Antiparasitic drugs in the benzimidazole family...Ch. 10 - Prob. 11CTCh. 10 - Scientists have cultured bacteria isolated from...Ch. 10 - Prob. 14CTCh. 10 - Enterococcus faecium is frequently resistant to...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- 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_forwardWhen determining the clinical significance of cultures, a. the number of microbes is signifi cant. b. the presence of a single colony of a true pathogen may indicate the presence of the disease if the culture comes from a site known to be sterile (i.e., cerebrospinal fl uid). c. the repeated isolation of a relatively pure culture of any microorganism can mean it is an agent of disease, although this is not always the case. d. a range of tests may be needed to identify a pathogen. e. all of the above are true.arrow_forwardthe following are the steps, listed in random order, for utilizing koch's postulates. what should be the second step out of the four listed? a. a microorganism is found to be present in every case of a disease. b. the same microbe discovered previously is isolated from the purposely infected host c. the pathogen is isolated and grown in pure culture d. the same disease results after isolated organism is inoculated into healthy hostarrow_forward
- Match the terminology correctly with the definition in the table below (eg A=1). TERMINOLOGY DEFINITION A. Aerosol 1. Disease caused by pathogen transfer B. Airborne infection 2. Process to kill or remove pathogenic microorganism (not spores) C. Asepsis 3. Organism capable of multiplication D. Decontamination 4. Process to kill/remove all microorganisms including spores and viruses E. Pathogen 5. Thick-walled resting cells formed by Gram+ organisms F. Infection 6. Organism able to cause disease in a host G. Disinfection 7. Suspension in air of finely dispersed solids or liquids H. Viable microorganisms 8. Caused by inhaling airborne material carrying microbial contaminants I. Sterilization 9. Prevention of microbial contamination J. Spores (bacterial) 10. Disinfection or sterilization of contaminated articlesarrow_forwardWhich one of the following methods of antimicrobial susceptibility testing combines some of the properties of two other methods and involves adding a plastic strip to the agar? Select one: a. Agar macrodilution method b. Gradient diffusion method c. Broth microdilution method d. Disk diffusion methodarrow_forwardWhich clinical situation would be appropriate for treatment with a narrow-spectrum antimicrobial drug? Select one: a.prophylaxis against infection after a surgical procedure b.The treatment of strep throat caused by culture identified as Streptococcus pyogenes c.None of the Above d.the treatment of a polymicrobial mixed infection in the intestine e.Empiric therapy (based on educated guesswork) of pneumonia while waiting for culture resultsarrow_forward
- Which 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_forwardE-strip testing can be used to determine a drug MIC against an organism. Which ONE of the following is correct? Select one: A. The zone of inhibition is inversely proportional to the activity of the drug B. The E-strip result guides to the maximum drug concentration that can be used to clear an infection C. The E-strip is impregnated with a fixed concentration of drug D. The E-strip is used broadly clinically to determine if an organism is resistant to a drug E. The MIC is read where bacterial growth touches the E-striparrow_forwardAn antimicrobial drug with a therapeutic index is a betterchoice than one with a therapeutic index.a. low, high b. high, lowarrow_forward
- A relatively large zone of inhibition surrounding an antimicrobial disk on a Kirby-Bauer test plate would most likely be interpreted as: a. sensitive reaction b. intermediate reaction c. resistant reactionarrow_forwardA compound synthesized by bacteria or fungi that destroys or inhibitsthe growth of other microbes is a(n)a. synthetic drug b. antibiotic c. antimicrobial drug d. competitive inhibitorarrow_forwardEx. 17: Chemotherapeutic Agents Using the Antimicrobial Susceptibility Table on pg 62 in the lab manual, determine whether not the bacteria plated in this Kirby-Bauer test are resistant (R), intermediate (I), or susceptible (S). The bacterial species tested was Escherichia coli (Gram negative). Ciprofloxacin Diameter = 20 Streptomycin Diameter 30 Carbenicillin Diameter 17 + Erythromycin Diameter = 23 Novobiocin Diameter = 0 bacterial growth = disk with antibiotic (see labels) = no growtharrow_forward
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