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 10MCQ
Which of the following is most likely to be bactericidal?
- a. membrane filtration
- b. ionizing radiation
- c. lyophilization (freeze-drying)
- d. deep-freezing
- e. all of the above
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what term best describes swabbing the skin with alcohol?
a.bacteriostasis
b. degerming
c. sterilization
d. sanitization
e. none of the above
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 efficacy
Which of the following is not an acid fast bacterium:
A. Mycobacterium tuberculosis
B. Salmonella enterica
C. Mycobacterium leprae
D. Nocardia asteroides
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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- high temperature washing of dishes for the purpose of decreasing disease transmission is an example of: a. sanitiation b. antisepsis c. autoclaving d. degerming e. none of the abovearrow_forwardWhich of the following effects is/are caused by formation of aninfectious biofilm?a. disseminated infection b. failure of drug therapy c. colonization of tissues d. a and b e. b and c f. all of thesearrow_forwardMacConkey (MAC) Agar is used to isolate gram-negative enteric bacteria.Peptone provides nutrients necessary for growth.Bile salts and crystal violet inhibit the growth of gram positive bacteria.Lactose is a carbohydrate. When metabolized, colonies turn the medium pink.Which organism/s will grow in the medium? a. Escherichia coli b. Pseudomonas aeruginosa c. Staphylococcus aureus d. Escherichia coli & Pseudomonas aeruginosa e. Pseudomonas aeruginosa & Staphylococcus aureusarrow_forward
- The mechanical removal of microbes from a limited area of living tissue is referred to as -- a. None of the above b. disinfection c. pasteurization d. antisepsis e. sterilizationarrow_forwardWhat results on a microdilution antimicrobial susceptibility test would indicate an antibiotic would be an effective treatment for an infection? O a. Growth next to the antibiotic O b. High optical density in the well with inoculum and antibiotic O c. Low optical density in the well with inoculum and antibiotic O d. No growth next to the antibiotic disk Clear my choice Next pagearrow_forwardA patient was admitted to the ER with severe virulent E. coli bacteremia and was given a high dose of intravenous ciprofloxacin antibiotic, to which the patient was not allergic. The patient develops fever and chills shortly afterward the administration of the antibiotic. Which of the following best describes the probable cause? Group of answer choices A. The Gram-negative E. coli released the endotoxin in the form of lipid A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. B. The Gram-negative E. coli released the endotoxin in the form of Protein A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. C. The Gram-positive E. coli released the endotoxin in the form of Protein A from the disintegrated lipopolysaccharides (LPS) upon death by the antibiotic leading to chills and fever. D. The Gram-positive E. coli released the endotoxin in the form of lipid A from the…arrow_forward
- Which 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_forwardWhich of the following is not used as an antiseptic? A. Chlorhexidine B. Phenol C. Iodophor D. Hydrogen Peroxidearrow_forwardMacConkey (MAC) Agar is used to isolate gram-negative enteric bacteria.Peptone provides nutrients necessary for growth.Bile salts and crystal violet inhibit the growth of gram positive bacteria.Lactose is a sugar. When metabolized, colonies turn the medium pink.Agar is a solidifying agent.Which component/s make the MAC agar selective? a. Lactose b. Peptone c. Agar d. Bile salts & Crystal Violetarrow_forward
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