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11 Cards in this Set
- Front
- Back
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Blood agar
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General purpose
pattern of hemolysis can aid in ID |
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Chocolate agar
(name 2) |
blood was heated to lysis to release nutrients
-Haemophilus and Neisseria |
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Thayer Martin
(name 1) |
(selective chocolate agar) Has antibiotics and selects for N. gonorroeae
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Mannitol-salt agar
(name 1) |
High salt con'c
-inhibits most organisms except S. aureus -fermentation changes from red to yellow |
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MacConkey agar
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Selective for gram -
(bile salts + crystal violet inhibits gram + and some fastidious -) -Lactose is sole carb, fermention changes to pink/red, if not clear |
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Eosin Methylene Blue (EMB)
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similar to MacConkey (except different dyes)
-lactose fermenters changes to blue/black w/ metallic sheen, if not clear |
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Bile esculin agar
(name 2) |
bile salts inhibit gram + and most streptococci except Group D streptococci and enterococcus
<esculin can be hydrolyzed to esculitin which interacts w Fe to produce black precipitate> |
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Hektoen enteric (HE)
(name 1) |
selective + differential for gram - (bile salts and indicator dyes inhibit gram +)
-sugars: lactose, sucrose, and salicin) ferments into yellow-pink, non is green/transparent -if H2S is produced (salmonella) black precipitate |
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Cetramide
(name 1) |
selective and differential for Pseudomonas aeruginosa, inhibits most bacteria as a detergent
-pigments: pyocyanin (blue-green), fluroescein (yello-green) |
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Tellurite (Cysteine tellurite)
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selective and differential for corynebacterium diptheriae
-K tellurite inhibits gram - and most upper respiratory flora -colonies appear gray-black (tellurite reductase activity), with brown halo (cystinase activity) |
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chromogenic
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selective and differential for lots of bacteria (based on color; used to identify species or phenotypes -specific and quicker growth
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