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15 Cards in this Set
- Front
- Back
Highly mucoid, acid on Lemb/MAC
Spot indle neg |
Klebsiella pneumoniae
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Highly mucoid, acid on Lemb/MAC
Spot indole pos |
Klebsiella oxytoca
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Green sheen on LEMB
Oxidase neg Spot indole pos |
E.coli
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Swarming
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Proteus
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Metallic sheen on BA
Blue-green on LEMB Grape odor |
Pseudomonas aeruginosa
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Small, translucent, gray, shiny, beta-hemolytic.
Catalase neg; PYR pos; GPC |
Strep group A
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Small, translucent, gray, shiny, gamma-hemolytic.
Catalase neg; PYR pos; GPC |
Enterococcus
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What are the criteria for doing a presumptive ID?
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-Pure culture
-Highly experienced tech |
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What causes methicillin resistance?
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the Mec A gene
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What does the Mec A gene encode?
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Altered binding proteins
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What is the best method for Methicillin resistance testing?
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Oxacillin disc, 6 ug, 35'C for 48 hrs, 2% NaCl in Mueller Hinton Agar.
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What is better at curing methicillin resistant organisms?
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Combination of Vancomycin + Rifampin
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Whats problem re: Strep pneumo antibiotic susceptibility?
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Penicillin susceptibility
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What is the choice method for detecting Strep pneumo penicillin resistance?
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-1 ug Oxacillin disc
-Mueller Hinton + 5% Blood agar -Increased CO2 |
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What are the ref ranges for Strep pneumo oxacillin -resist testing?
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If 20 mm or greater, SUSCEPTBLE.
If less than 20, RESISTANT. |