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 7, Problem 6MCQ
The data were obtained from a use-dilution test comparing four disinfectants against Salmonella choleraesuis. G = growth, NG = no growth
6. Which disinfectant is the most effective?
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Which disinfectant is the most effective? and why?
Which disinfectant(s) is (are) bactericidal? and why?
Z-germicSide is an antimicrobial agent. Based on the given data set below, describe how effective Z-germicSide is as a disinfectant.
Name of disinfectant
Z-germicSide
Phenol
KEY: No growth, += Growth
Dilution
1:100
1:125
1:150
1:175
1:200
1:95
1:100
1:105
1:110
1:115
Growth after 5 mins
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+
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+
Growth after 10
minutes
+
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Growth after 15
mins
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I'm looking for the mode of action only.
Chapter 7 Solutions
Microbiology: An Introduction
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 - A use-dilution test was used to evaluate two...Ch. 7 - To determine the lethal action of microwave...Ch. 7 - Entamoeba histolytica and Giardia lamblia were...Ch. 7 - Between March 9 and April 12five chronic...Ch. 7 - Prob. 3CAE
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- Examine the given sets of table below. Which disinfectant is the MOST recommended? Support and Justify your answer. Table 2. Phenol Coefficient of Test Disinfectant Name of disinfectant Growth after 5 minutes Dettol Phenol Name of disinfectant Z-germicSide Phenol Name of disinfectant Jik Phenol KEY:- = No growth, + = Growth Dilution 1:100 1:125 1:150 1:175 1:200 1:95 1:100 1:105 1:110 1:115 Dilution 1:100 1:125 1:150 1:175 1:200 1:95 1:100 1:105 1:110 1:115 Dilution 1:100 1:125 1:150 1:175 1:200 1:95 1:100 1:105 1:110 1:115 + + + + + + + + Growth after 5 mins + + + + + + + Growth after 5 mins + + + + + + Growth after 10 minutes + + + + + Growth after 10 minutes + + + + + Growth after 10 mins + - + + + + + + Growth after 15 minutes + + + + + + Growth after 15 mins - + + + + + Growth after 15 mins + + + + - + + + +arrow_forwardAnswer the following questions briefly and concisely 1.How do bacteria in a chemostat and those in a batch culture vary from one another? 2. What happens in a chemostat if the dilution rate is higher than the organism's maximum specific growth rate? 3.Does a chemostat require the use of pure cultures? 4. Why would a complicated culture media for Leuconostoc mesenteroides be simpler to make than one with a fixed chemical composition?arrow_forward1 H 2 176 old culture Smear too BOTERC Losk like? + b. Failure to apply the decolorizer. + ne c. Failure to apply the safranin. Determine whether bacteria are motle or non-motle by looking at the growth in semi-solid medium What is the concentration of agar in (a) typical solid medium (b) semi sold motility medium? Arawer Q1 on Page 357. 7. Orygen Requirement: + d. Reversal of crystal violet and safranin stains. A questions 1.2 and 3 o Pg 83-84 Refer to the power point Questions 1 Predict the effect of the following "mistakes" made when performing a Gram stain. Your answer needs to address the predicted effect on both Gram-positive and Gram-negative cells. Consider each mistake independently. a. Failure to add the iodine. 414 gait to fer. 2 Both crystal violet and safranin are basic stains and may be used to do simple stains on Gram-positive and Gram-negative cells. This being the case, explain how they stain different cell types in the Gram stain. why? a cell wall. patem in…arrow_forward
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