MICROBIOLOGY BNDL W/MASTERING >BI<
11th Edition
ISBN: 9781323856437
Author: Tortora
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 7, Problem 7MCQ
The data were obtained from a use-dilution test comparing four disinfectants against Salmonella choleraesuis. G = growth, NG = no growth
7. Which disinfectant(s) is (are) bactericidal?
- a. A, B, C, and D
- b. A, C, and D
- c. A only
- d. B only
- e. none of the above
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
the 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 host
Which ONE of the following best describes nitrofurantoin?
Select one:
A.
A macrolide antimicrobial agent
B.
An antimicrobial prodrug
C.
A natural product produced by Streptomyces spp.
D.
Useful in treating systemic infections
E.
A nucleic acid synthesis inhibitor
Which ONE of the following best describes cephalexin?
Select one:
A.
The bacterial target is located on the internal side of the cytoplasmic membrane
B.
An agent suitable for community use
C.
Resistance readily occurs via drug efflux in Gram-positive bacteria
D.
A parenteral penicillin
E.
An agent capable of disrupting bacterial membranes
Which ONE of the following best describes ciprofloxacin?
Select one:
A.
Active against Streptococcus pneumoniae
B.
An inhibitor of RNA synthesis
C.
An antimicrobial prodrug
D.
A natural product produced by Streptomyces spp.
E.
Subject to new restrictions and precautions for use due to very rare reports of…
Which of the following is not a property of an antimicrobialagent?(a) Must have a favorable chemotherapeutic index(b) Must be selectively toxic(c) Must be effective against viral diseases(d) Must have a known concentration over a period oftime required to eliminate a pathogen(e) b and c
Chapter 7 Solutions
MICROBIOLOGY BNDL W/MASTERING >BI<
Ch. 7 - The thermal death time for a suspension of...Ch. 7 - If pasteurization does not achieve sterilization,...Ch. 7 - Thermal death point is not considered an accurate...Ch. 7 - Prob. 4RCh. 7 - DRAW IT A bacterial culture was in log phase in...Ch. 7 - How do autoclaving, hot air, and pasteurization...Ch. 7 - How do salts and sugars preserve foods? Why are...Ch. 7 - Prob. 8RCh. 7 - A large hospital washes burn patients in a...Ch. 7 - Prob. 10R
Ch. 7 - Which of the following does not kill endospores?...Ch. 7 - Which of the following is most effective for...Ch. 7 - Prob. 3MCQCh. 7 - Which of the following cannot be used to sterilize...Ch. 7 - Prob. 5MCQCh. 7 - The data were obtained from a use-dilution test...Ch. 7 - The data were obtained from a use-dilution test...Ch. 7 - Prob. 8MCQCh. 7 - A classmate is trying to determine how a...Ch. 7 - Which of the following is most likely to be...Ch. 7 - Prob. 1ACh. 7 - For each of the following bacteria, explain why it...Ch. 7 - To determine the lethal action of microwave...Ch. 7 - A use-dilution test was used to evaluate two...Ch. 7 - Entamoeba histolytica and Giardia lamblia were...Ch. 7 - Between March 9 and April 12five chronic...Ch. 7 - Prob. 3CAE
Additional Science Textbook Solutions
Find more solutions based on key concepts
__________type of respiration that uses molecules other than O2 as final electron acceptors
Study Guide for Campbell Biology
What type of culture medium would increase the size of a bacterial capsule?
Laboratory Experiments in Microbiology (11th Edition)
Biogeochemical cycling involves three primary steps: __________, __________, and ______.
Microbiology with Diseases by Taxonomy (5th Edition)
Organisms with the genotypes AABbCcDd and AaBbCcDd are crossed. What are the expected propor-tions of the follo...
Genetic Analysis: An Integrated Approach (3rd Edition)
Knowledge Booster
Learn more about
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
- 1. a. Disk A b. Disk B c. Disk C d. Disk D 2. a. Strip A with MIC at 0.25 μg/mL b. Strip B with MIC at 0.064 μg/mL c. Strip C with MIC at 0.075 μg/mL d. All of the strips show equal antimicrobial efficacyarrow_forward1. Illustrate in a diagram the identification scheme from gram-positive cocci.2. Discuss the principle involved in the biochemical tests in identifying species of staphylococci.3. Illustrate in a diagram the identification scheme for Streptococci.4. Discuss the principle involved in the biochemical tests in identifying species of Streptococci.arrow_forwardYour nasal sample showed colonies with a clear halo around them on blood agar. What can you determine based on that observation? a. The organism is a mannitol fermenter b. The organism is able to utilize starch c. The organism is reducing the hemoglobin and damaging the erythrocytes d. The organism is beta-hemolytic e. The organism is unable to use red blood cells as a nutrient sourcearrow_forward
- Which type(s) of medium would be used in each scenario?a. isolating the growth of Streptococcus pyogenes from a patient’s throat swabb. isolating a pathogen from a patient’s clean-catch urine samplec. isolating enteric bacteria such as Escherichia coli from a sample oforganically grown spinach d. maintaining a patient’s nasal swab specimen for further analysis andidentifi cation of possible respiratory syncytial virus (RSV) infectionarrow_forward1. The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization? 3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distilledarrow_forwardWhich ONE of the following is not taken into consideration when determining the ‘clinical breakpoint’? Select one: A. The drug MIC distribution for the wild-type bacterial population B. The microbiological outcome C. The drug Cmax value D. Pharmacodynamical parameters E. Elimination half-life of the drugarrow_forward
- Maargerines made from plant oils are healthier, since they are hydrogenated for spreadability? A)True B)falsearrow_forwardWhich of following statements is TRUE about antiseptics and disinfectants? A. Disc diffusion works because the disc is soaked in bacteria and is the exposed to antimicrobial. B. You can tell the characteristics of the zone inhibition whether an organism is cidal or static in its effect. C.The shape of an object being cleaned may influence the effectiveness of germicides D. Gram + organisms are more resistant than Gram - organisms E. A large zone of inhibition shows bactericidal effectarrow_forwardDoctors prescribe synergistic drug combinations to treatbacterial infections. The purpose of such treatment is to:(a) Change the bacteria with cell walls to L forms lackingcell walls(b) Reduce the treatment time of the disease(c) Prevent microorganisms from acquiring drug resis-tance(d) Reduce the toxic side effects of the antibiotics(e) Use lower doses of antibioticsarrow_forward
- The Petri Dish method is used in microbiology to raise bacteria in: a) rapid growth b) pure culture c) septic environment d) all of the above 2. What is the difference between antiseptic and sanitization?3. In order to prevent any kind of contamination the medium must be _________ before placing it in the Petri dish. a) lyophilized b) pasteurized c) autoclaved d) distillearrow_forwardYou spread 0.1 mL volume of a 10^(-6) dilution onto a nutrient agar plate. After 24 hours of incubation at 37°C, there were 280 colonies of bacteria on the plate. A.) What is the original concentration (OCD) of bacteria in the stock sample this dilution came from? B.) Using the OCD value from part A, determine the number of colonies that would be expected to grow on a plate that is inoculated with 0.1 mL volume of 10^(-8) dilution from this same stock of bacteria. Show your work for both.arrow_forward1 (a)Why is the spectrophotometer set at 0.000 absorbance for the uninoculated tube of broth? (B) Why can't you use the same plot (or standard curve) of plot of absorbance versus cell count for Escherichia coli for other bacteria? (C)List 3 advantages of estimating microbial numbers or biomass by the turbidimetric method? (C)(ii)List 2 disadvantages of this method? (D) Can you measure all kinds of microbes this way? Why not? ( this is not a graded assignment)arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Comprehensive Medical Assisting: Administrative a...NursingISBN:9781305964792Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy CorreaPublisher:Cengage Learning
Comprehensive Medical Assisting: Administrative a...
Nursing
ISBN:9781305964792
Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa
Publisher:Cengage Learning