11 Questions
What is the purpose of adding blood and other special nutrients to the general media in enriched media?
To encourage the growth of fastidious heterotrophs
What gives blood agar its opaque red color when solidified?
Presence of hemoglobin from blood
Why is chocolate agar considered suitable for the growth of Neisseria?
The medium is heated after preparation
Which type of bacteria can be identified by their hemolytic action on the red cells in blood agar?
Staphylococcus aureus
What distinguishes selective media from general media in promoting microbial growth?
Selective media favor the growth of specific groups and suppress others
What is the primary purpose of selective media?
To inhibit the growth of certain microorganisms
Which medium is used for the cultivation of tuberculosis bacilli?
Lowenstein Jensen medium
What is the purpose of the bile salts in MacConkey agar?
To inhibit the growth of non-intestinal bacteria
Which medium is used to isolate gram-positive bacteria?
Phenylethyl alcohol agar (PEA)
What is the purpose of the neutral red indicator in MacConkey agar?
To change color in the presence of acid produced by lactose fermentation
What is the primary purpose of mannitol salt agar (MSA)?
To isolate staphylococci from clinical and non-clinical samples
Explore how special purpose media support the growth of specific microorganisms. Learn about enriched media like blood agar and how they encourage the growth of fastidious heterotrophs with the addition of special nutrients. Discover the process of preparing blood agar medium and its characteristics.
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