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7 Cards in this Set
- Front
- Back
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Acetamide Utilization |
Principle: use acetamide as sole of carbon, deaminate acetamide to release ammonia pH-driven color: green to royal blue pos rxn: blue color neg rxn: no color change |
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Acetate Utilization |
Principle: breakdown of sodium acetate to shift toward the alkaline range indicator: from green to blue pos rxn: medium becomes alkaline blue neg rxn: no growth or growth w/ no indicator change to blue |
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Bacitracin Test |
organism: Streptococcus pyogenes (inhibited by the small amount of bacitracin in disk) pos rxn: zone of inhibition around the disk neg rxn: no zone of inhibition |
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Bile Esculin Agar |
gram+ bact other than group D strep and entero are inh by the bile indicator: ferric ammonium citrate (dark brown color) ferric ions to form a phenolic iron complex pos rxn: blackening of the agar slant neg rxn: no blackening |
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Bile Solubility Test |
Principle: diff S. pneumoniae from alpha-hemolytic streptococci lysis depends on the presence of intracellular autolytic enzymes pos rxn: colony disintegrates neg rxn: intact colonies |
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Cetrimide |
principles: org to grow in the pre of cetrimide pos: growth neg: no growth |
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Citrate Utilization |
principle: utilize sodium citrate as CO2 and inorganic ammonium salts as N indicator: bromthymol blue from green to blue pos: growth in thr medium w/ or w/o change in color of the indicator neg: absence of growth |
