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Micro Media

selective and differential media

TermDefinition
Blood agar, sheep Tryptic soy agar with 5% sheep blood added. Grows most non-fastidious bacteria
Chocolate agar Enriched medium. Supplies X & V factors.
Columbia colistin-nalidixic acid agar (CNA) Selective for gram positives. Colistin and nalidixic acid suppress most gram-negatives.
Phenylethyl alcohol agar Selective for gram-positive cocci and anaerobic gram-negative rods.
Streptococcal selective agar (SSA) Selective for Group A and B strep. Contains trimethoprim-sulfamethoxazole in 5% sheep blood.
Eosin methylene blue (EMB) Selective, differential medium for enteric gram-negative rods. Eosin and methylene blue.
MacConkey agar (MAC) Selective, differential medium for enteric gram-negative rods. Bile sale and crystal violet.
MacConkey sorbitol agar (SMAC) Selective for E. coli 0157:H7, which does not ferment sorbitol. Colonies are colorless.
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.
Xylose lysine deoxycholate (XLD) Selective, differential medium for isolation f Salmonella and Shigella from stool.
Salmonella-Shigella agar (SS) Selective for Salmonella and Shigella. Brillian green and bile salts inhibit coliforms.
Campylobacter blood agar (Campy BA) Selective enrichment medium for isolation of Campylobacter form stool.
Created by: 3215525