1. The differential aspect of MacConkey agar allows for the determination of which bacteria are lactose fermenters and which are not. 2. Blood agar is used to determine an organism's ability for hemolysis. Blood agar is differential in this regard. 3. EMB agar uses two dyes, eosin and methylene blue, to restrict the growth of gram-positive organisms, making this agar (EMB) in this regard. 4. Crystal violet dye in MacConkey agar will prevent some organisms from growing, making MacConkey agar in this regard. The crystal violet dye can also be used in the determination of the ability to ferment the carbohydrate in the agar; making MacConkey agar in this regard. 5. Use of an agar which contains an elevated amount of salt would allow some organisms to grow while preventing the growth of other organisms. This media would be considered selective

1. The differential aspect of MacConkey agar allows for the determination of which bacteria are lactose fermenters and which are not. 2. Blood agar is used to determine an organism's ability for hemolysis. Blood agar is differential in this regard. 3. EMB agar uses two dyes, eosin and methylene blue, to restrict the growth of gram-positive organisms, making this agar (EMB) in this regard. 4. Crystal violet dye in MacConkey agar will prevent some organisms from growing, making MacConkey agar in this regard. The crystal violet dye can also be used in the determination of the ability to ferment the carbohydrate in the agar; making MacConkey agar in this regard. 5. Use of an agar which contains an elevated amount of salt would allow some organisms to grow while preventing the growth of other organisms. This media would be considered selective

Comprehensive Medical Assisting: Administrative and Clinical Competencies (MindTap Course List)

6th Edition

ISBN:9781305964792

Author:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Publisher:Wilburta Q. Lindh, Carol D. Tamparo, Barbara M. Dahl, Julie Morris, Cindy Correa

Chapter42: Basic Microbiology

Section: Chapter Questions

Problem 4CR

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If you streak a sample from your nose onto a Mannitol salt agar plate and the medium turns yellow, what does that tell you? (choose all that apply) a. The organism is a yeast b. The organism ferments mannitol c. The organism is beta-hemolytic d. The organism is likely Staphylococus aureus e. The organism is acid tolerant
1. What are the two ways that nitrate can be reduced by the bacteria. Explain briefly. 2. What organisms are being differentiated in the butyrate disc test. Explain its reaction to the test.
1. The selective ingredient in mannitol salt agar is ______________, which selects for the growth of Staphylococcus organisms.
explain how the use of an Eosin methylene blue agar plate can help determine the type of fermenters that bacteria are. explain throughly.
while working with mannitol salt agar you notice the growth of staphylococci however other microorganism are growing as well. how would you interpret this?
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Which of the following medium would be most appropriate for the bacterial cultures from stomach? a. LB b. Selective C. Differential d. Nutient
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1. While working with Mannitol Salt Agar you notice the growth of staphylococci however other microorganisms are growing as well. How would you interpret this?
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