Bact
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Created by:
CLSwag2013 on September 22, 2011
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37 terms
Terms | Definitions |
|---|---|
 General Description of Strep species | Gm +, cocci, pairs and chains, falcultative anaerobes, Catalase negative |
| Streptococcus pyogenes | Group A, Beta hemolytic, Bacitracin susceptible, PYR positive, SXT resistant, LAP positive |
| Infections of S. Pyogenes | Pharyngitis, Scarlet fever, Rheumatic fever, Acute Glomerulononephritis, streptococcal toxic shock syndrome |
| Acute glomerulonephritis | sequelea to pharyngitis, impetigo, or pyoderma |
| Virulence factors of S. Pyogenes | M protein-resist phagocytosis Protein F- Adhesion to epithelial Hyaluronic acid capsule- prevents phagocytosis masks antigens: weakly immunogenic |
| SLO | Streptolysin- "Oxygen labile" resists phaygocytosis-highly immunogenic |
| Streptolysin S | "Oxygen Stable" lyses RBC & WBC |
| Streptococcal pygenic exotoxins | Erythrogenic toxin- scarlet fever |
| Agalactiae | Beta hemolytic, CAMP Positive (arrowhead), Na Hippurate positive, LAP positive, SXT resistant PYR- negative |
| Agalactiae infection | Neonatal sepsis and meningitis, postpartum fever and sepsis |
| Virulence factor of agalactiae | Capsule, Sialic acid, hemolysin, CAMP factor (RBC lysis), Neuraminidase, Protease |
| Non-enterococcus | Alpha-Gamma hemolysis, Bile esculin positive, No growth on NaCl, PYR negative, LAP positive, Penicillin susceptible |
| Strep. pneumoniae | Lancelet shaped pairs, Alpha hemolytic, Optochin susceptible, SXT positive, LAP positive, Quellung reaction positive, |
| S. Pneumoniae virulence factors | Capsular, C substance in cell wall |
| Viridans Strep | Alpha & Gamma hemolytic, Bile insoluble, Fastidious (CO2 required) |
| Infections of Viridans | Subacute bacterial endocarditis, Bacteremia in children, |
| two species in Nutritionally variant Streptococci | Abiotrophia & Granulicatella |
| General features of NVS | Gram- Variable, pleomorphic, BE negative, NaCl Negative, PYR positive; B6(thiol) dependent |
| Enterococcus species | Alpha-Beta hemolysis, BE positive, NaCl positive, SXT reistant, weakly catalase positive |
| Enterococcus species virulence factors | high salt concentration growth, Highly resistant, |
| Aerococcus | Airborne, Vancomycin susceptible, GPC in tetrads or clusters, hippurate hydrolysis-positive, LAP neg, PYR-positive |
| Leuconostoc | Intrinsically resistant to vancomycin, LAP negative, PYR negative |
| Pediococcus | LAP pos, PYR neg, Intrinsically resistant to Vancomycin, BE positive |
| treatment for S. Pneumoniae | erythromycin or chloramphenicol |
| What is susceptible to Bacitracin | Group A |
| What is susceptible to SXT | Groups A, B, and D |
| PYR Hydrolysis Test function and and positive tests | Detects pyrrolidonyl aminopeptidase; positve tests S. Pygenes, Gamella, Enterococcus, Aerococcus (Positive Test turns Pink) |
| What is Positve for CAMP | Group B |
| hippurate Hydrolysis | hippuricase detection positive for Group B |
| What is Optochin Susceptible | S. pneumoniae; Correllates with Quellung reactijon |
| Bile Solubility | Positve: Strep pneumoniae; |
| Quellung Test | Detect Polysaccharide capsule; Positive: Strep Pneumoniae |
| LAP | Positive: Streptococcus Enterococcus Pediococcus Negative: Aerococcus Leuconostoc |
| Bile Esculin | Positive: Group D (both) |
| 6.5% NaCl | Positve: Group D enterococcus, Aerococcus Negative: Gp D non-enterococcus Variable: Pediococcus, Leuconostoc, Group B strep agalacitae |
| Pneumoslide | Positive: Strep Pneumoniae |
| Vancomycin resistance | VRE, Pediococcus and Leuconsostoc |
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