selective and differential media
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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Blood agar, sheep | Tryptic soy agar with 5% sheep blood added. Grows most non-fastidious bacteria
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Chocolate agar | Enriched medium. Supplies X & V factors.
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Columbia colistin-nalidixic acid agar (CNA) | Selective for gram positives. Colistin and nalidixic acid suppress most gram-negatives.
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Phenylethyl alcohol agar | Selective for gram-positive cocci and anaerobic gram-negative rods.
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Streptococcal selective agar (SSA) | Selective for Group A and B strep. Contains trimethoprim-sulfamethoxazole in 5% sheep blood.
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Eosin methylene blue (EMB) | Selective, differential medium for enteric gram-negative rods. Eosin and methylene blue.
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MacConkey agar (MAC) | Selective, differential medium for enteric gram-negative rods. Bile sale and crystal violet.
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MacConkey sorbitol agar (SMAC) | Selective for E. coli 0157:H7, which does not ferment sorbitol. Colonies are colorless.
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Hektoen enteric agar (HE) | Selective, differential medium for isolation of enteric pathogens from stool. Bile salts, bromothymol blue, and acid fushin inhibit normal GI flora.
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Xylose lysine deoxycholate (XLD) | Selective, differential medium for isolation f Salmonella and Shigella from stool.
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Salmonella-Shigella agar (SS) | Selective for Salmonella and Shigella. Brillian green and bile salts inhibit coliforms.
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Campylobacter blood agar (Campy BA) | Selective enrichment medium for isolation of Campylobacter form stool.
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