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30 Cards in this Set
- Front
- Back
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Where do Group B Strep. Usually colonize
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lower GI tract and vaginal epithelium
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What is a bad test for GBS
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Growth in 6.5% NaCl is variable.
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What is an indicator of a resistant Bacitracin Test?
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No zone.
GBS Bacitracin R |
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What test can be used to distinguish Group A and B strep from other Groups
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Sulfamethoxzaole Trimethoprim
SXT R |
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What do you see with Hippurate test on GBS?
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Positive they hydrolyze hippurate to glycine and benzoic acid
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What's a good test to identify GBS
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CAMP test.
GBS produces arrowhead |
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How does Group B strep grow in Bile Esculin?
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No black color, on the plate.
No hydrolysis |
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Is GBS R/S to Optochin?
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R
Test done on Blood Agar |
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Pyr test.
If pyr is hydrolyzed-->? |
Naphtylamide
Detected by red dye GBS - |
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c5a peptidase
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cleaves c5a at c terminus.
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Leading Cause of Neonatal meningitis
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GBS
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Early onset Neonatal Sepsis
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in utereo, within 5 days of birth.
. Mortality rate 50% |
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Late Onset Neonatal Sepsis
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occurs 10 days - 4 months.
Mortality rate 20% Spread via breast feeding |
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Normal habitat of GBS
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Phraynx, vagina, stool
Ex. S. agalactiae |
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Most common infections of GBS
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Skins, soft tissue, and bones.
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Treatment for GBS disease
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Penicillin G plus aminoglycoside
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What agar is used to detect GCS
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Columbia agar
- nalidixic acid - - colistin - |
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Examples of GCS
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S. equi
- strangles in horses S. dysagalactiae |
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Two types of GDS
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Enterococci
Nonenterococci |
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Entercocci Inhabit?
Common for what infections? Inovled with what percent of endocarditis? Resitant to? |
Gi Tract
Noscomial/UTI 15-20% Penicillin/Cephalosporins |
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VDE?
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Vancomycin Dependent Enterococci
- gorw only in the presence of vancomycin |
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Enterococci organisms and infections
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E. faecelis and E. faecium
95% of all enterococcal infections |
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Phermones
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produced by enterococci
- promotes conjugation between enterococci |
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Bacteriocin AS-48
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produced by enterococci
- selective against other entero-/Gram+ bacteria |
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Non-enterococci organism
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S. bovis
- two types: 1. Mannitol + (Cow) 2. Mannitol - (Human) |
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GFS group?
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Anginosus Group
- same ID profile as Strep C - S. anginosus |
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Example of Group K Strep
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S. salivarius
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Identification in lab of No Lancefield Group Strep.
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Quelleng Reaction
-S. pneumoniae |
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What did Griffith discover about S. pneumoniae?
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transformation
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S. pneumoniae is a major cause of what?
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community acquired bacterial pneumonia
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