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24 Cards in this Set
- Front
- Back
best media used to screen GBS, group B strep
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LIM broth
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differentiate among clinically relevant alpha hemolytic strep
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S. pnuemoniae is bile soluble optochin susceptible
Viridans strep is bile insoluble optochin resistant |
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differentiate group D strep from Enterococcus
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both postive bile eschilin test but Enterococcus is only one of two that grows in 6.5% NaCl broth
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biochemical test for presumptive or definative id of beta hemolyticc gram positve cocci in chains
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bile esculin, PYR, bacitracin, hippurate, CAMP, VP
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group B strep most commonly associated w what disease
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meningitis in neonates and elderly
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biochemical differentiation among clinically relevant beta hemolytic strep
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S. pyogenes positive PYR
S. agalactiae positive Hipp and CAMP |
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cause of exudative pharygitis
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S. pyogenes
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characteristic of Enterococcus from group D strep
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Enterococci relatively resistant to antibiotics, ie penicillin
Enterococci grows in 6.5% NaCl broth |
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organism considered universally susceptible to penicillin
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S. pyogenes
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beta hemolytic gram-positive cocci isolated from neonate
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S. agalactiae
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most appropiate culture media to select and differentiate Salmonella
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bismuth sulfite
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sputum gram stain demonstrating numerous neutrophils and small, pleomorphic gram-negative bacilli suggests
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Haemophilus, most likely H. influenzae coming from sputum, respiratory infection
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least bochemically reactive member of Enterobacteriaceae
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Shiggella spp
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Enterobacteriaceae that produces H2S
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Salmonella spp
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colorless growth on MAC, yellow colonies on HE agar, acid/acid TSI with no gas or H2S, possible pathogen
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gram-negative non-lactose fermentor, sucrose fermentor indicates Yersinia spp
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TSI reactions alkaline slant, acid butt, no H2S, no gas produced not what?
1. 2. |
1. Salmonella spp because produce H2S
2. Yersinia spp or E. coli because produce acid/acid TSI |
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acid slant/acid butt on TSI no H2S no gas, possible enterics
1. 2. how differentiate? |
1. E. coli (lactose fermentor)
2. Yersinia spp |
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organism cause severe cholera-like symptoms through production of enterotoxins
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E. coli
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group D shigella that produce capsule
procedure to remove capsule for antisera agglutination? |
S. sonnei
boiling organism |
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VP positive, nonmotile, gram-negative bacilli
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Klebsiella
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differentiation of P. aeruginosa among other Pseudomonas spp
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P. aeruginosa grows at 42*C
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oxidase and catalase positive nonmotile gram-negative bacilli which optimally grows at 42*C
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Campylobacter jejuni
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species isolated on chocolate agar from patient w epiglottitis possible pathogens
1. 2. 3. how differentiate? |
1. H. influenzae
2. H. parainfluenzae requires V but not X factor 3. H. haemolyticus is hemolytic |
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differentiation between Acinebacter spp and Moraxella spp
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Acinetobacter is oxidase negative
Moraxella spp is oxidase positive |