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36 Cards in this Set
- Front
- Back
Bug that contains virulence factor protein A (binds to Fc portion of IgG and prevents phagocytosis), inhibits Ab mediated clearance, and has ribitol phosphate in its wall?
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Staphylococcus aureus
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Difference between Staph. aureus and Staph epidermis:
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S. aureus is coagulase +
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produces scalded skin syndrome in newborns:
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epidermolytic toxin
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Difference between Staph. aureus and Staph epidermis:
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S. aureus is coagulase +
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difference between Viridian and S. pneumoniae:
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S. pneumoniae is Bile soluble
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difference between Group D Strep. and enterococcus (viridians):
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Group D Strep. has salt intolerance and is PYR negative. Entrococcus grows in NaCl.
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Virulence factors for Group A Streptococcus:
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M-protein, Lipoteichoic acid, Streptokinase, DNase, Hyaluronidase, Anti-C5a peptidase
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Toxins for Group A Streptococcus:
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Erythrogenic or Pyrogenic Toxin (scarlet fever), TSS toxin
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Diagnosis for Group A Streptococcus:
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Gram (+) in chains, growth inhibited by bacitracin
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Treatment for Group A Streptococcus:
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Penicillin G, Penicillin V, Erythromycin, Penicillinase-resistant penicillin
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causes neonatal meningitis, pneumonia, and sepsis
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Streptococcus agalactiae (Group B)
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Treatment for Streptococcus agalactiae (Group B):
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Penicillin G
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Diagnosis of Streptococcus agalactiae (Group B):
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Gram stain & culture of CSF
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Pathology of Enterococci, Streptococcus bovis & equinus (Group D):
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Subacute endocarditis, biliary tract infections, UTIs
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Treatment for Enterococci, Streptococcus bovis & equinus (Group D):
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Ampicillin (penicillin G & vancomycin resistance)
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Diagnosis of Enterococci, Streptococcus bovis & equinus (Group D):
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Gram (+), NaCl/bile solution (nonenterococci will not grow without it)
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Virulence factors for Viridans streptococci:
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extracellular dextran (heart valve adherence)
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Pathology of Viridans streptococci:
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Subacute bacterial endocarditis, dental caries, brain & liver abcesses
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Treatment of Viridans streptococci:
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Penicillin G
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Diagnosis of Viridans streptococci:
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Gram (+), Culture, resistant to optochin
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Location of normal colonization of Viridans streptococci:
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nasopharynx, gingival crevices, GI tract
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Location of normal colonization of Streptococcus agalactiae (Group B):
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vagina of pregnant women
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Virulence factors of Streptococcus pneumoniae:
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Capsule
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Toxins of Streptococcus pneumoniae:
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Pneumolysin (binds to cholesterol in cell membrane)
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Pathology of Streptococcus pneumoniae:
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Pneumonia, meningitis, sepsis, otitis media
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Treatment of Streptococcus pneumoniae:
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Penicillin G, Erythromycin, Ceftriaxone, Vaccine
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Diagnosis of Streptococcus pneumoniae:
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Catalase (-), Gram (+) diplococci, Quellung (+) (swelling in response to anti-capsular antibodies), will not grow in presence of optochin or bile
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Virulence of Staphylococcus aureus:
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Protein A (IgG-binding), Coagulase, Hemolysins, Leukocidins, Penicillinase, Hyaluronidase, Staphylokinase, Lipase
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Toxins of Staphylococcus aureus:
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Exfoliatin (SSS), enterotoxin, TSST-1
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Treatment of Staphylococcus aureus:
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Penicillinase-resistant penicillin, vancomycin, clindamycin, IV vancomycin for MRSA
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Diagnosis of Staphylococcus aureus:
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clustured Gram (+), catalase & coagulase (+), golden pigment, beta hemolytic
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Virulence of Staphylococcus epidermidis:
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polysaccharide capsule (prosthetic adherence), antibiotic resistance
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Treatment of Staphylococcus epidermidis:
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vancomycin (antibiotic resistance!)
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Diagnosis of Staphylococcus epidermidis:
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Gram (+) clusters, catalase (+), coagulase (-)
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Treatment of Staphylococcus saprophyticus:
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penicillin
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Diagnosis of Staphylococcus saprophyticus:
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Gram (+) clusters, gamma hemolytic, catalase (+), coagulase (-)
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