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Questions and Answers
What type of media is designed to support the growth of most nonfastidious bacteria?
What type of media is designed to support the growth of most nonfastidious bacteria?
- Selective media
- Enrichment media
- Differential media
- Supportive media (correct)
Which type of media contains added growth factors such as blood and vitamins?
Which type of media contains added growth factors such as blood and vitamins?
- Enrichment media (correct)
- Selective media
- Supportive media
- Differential media
Which type of media uses additives to inhibit the growth of certain bacteria?
Which type of media uses additives to inhibit the growth of certain bacteria?
- Selective media (correct)
- Differential media
- Supportive media
- Enrichment media
What is the primary purpose of differential media?
What is the primary purpose of differential media?
Which of the following is an example of selective media?
Which of the following is an example of selective media?
Flashcards
Supportive Media
Supportive Media
Media that allows the growth of many types of bacteria.
Enrichment Media
Enrichment Media
Media that encourages specific bacteria to grow by providing extra nutrients or growth factors.
Selective Media
Selective Media
Media that stops certain bacteria from growing while allowing others to grow.
Differential Media
Differential Media
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Media Types
Media Types
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Study Notes
Media Types in Microbiology
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Supportive media: Support the growth of most non-fastidious bacteria. Examples include nutrient agar and trypticase soy agar.
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Enrichment media: Contain added growth factors (e.g., blood, vitamins, yeast extract) to promote the growth of specific bacteria, or to allow the growth of fastidious bacteria. Examples include sheep blood agar, chocolate agar, brain-heart infusion, and buffered charcoal-yeast extract agar.
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Selective media: Contain additives (dyes, bile salts, alcohols, acids, or antibiotics) to inhibit the growth of certain types of bacteria (e.g., Gram-positive). Examples include Columbia colistin–nalidixic acid (CNA) agar, eosin methylene blue (EMB), MacConkey agar, Hektoen enteric agar, xylose lysine deoxycholate (XLD) agar, and Thayer-Martin agar.
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Differential media: Designed to visually distinguish different bacterial colonies based on their biochemical reactions (e.g., lactose fermentation, hydrogen sulfide production). Examples include EMB agar, MacConkey agar, Hektoen enteric agar, and XLD agar.
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