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39 Cards in this Set

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Genera in the Streptococcease Family
"Streptococcus, Abiotrophia, Granulicatella"
Genera in the Enterococcaceae Family
Enterococcus
Species in the Streptococcus genus
"S pyogenes (group A), S agalactiae (group B), S pneumonia, Viridans strep (s mitis, s mutans, s sanguis)"
Species in the Enterococcus Genus
"E faecalis, E faecium"
Gram Stain
positive
Diameter of cells
0.6 - 1.0 microns
organization of multicellular groups
pairs and chains
appearance of colonies in media
"sharply defined, smooth, translucent on nonselective media"
type of metabolism
oxygen tolerant anaerobe
Shape of cells
coccus
biochemical criteria (s pyogenes)
"wide zone beta hemolysis on blood agar, bacitracin susceptible, PYRase positive, detection of lancefield group A antigens"
biochemical criteria (s agalactiae)
"narrow zone beta hemolysis on blood agar, bacitracin resistant, PYRase negative, CAMP test positive, detection of lancefield group B antigen"
biochemical criteria (s pneumonia)
"alpha hemolysis on blood agar, optochin susceptible, quelling reaction positive, bile solubility positive"
biochemical criteria (viridans streptococci)
"alpha hemolysis on blood agar, optochin resistant, quelling reaction negative, bile solubility negative"
biochemical criteria (Enterococcus species)
"alpha, beta, or gamma hydrolysis, esculin hydrolysis in the presence of bile salts, growth in 6.5% NaCl broth, PYRase test"
somatic virulence factors (s pyogenes)
"capsule, m protein, protein f, lipoteichoic acid"
enzyme virulence factors (s pyogenes)
"streptolysin O and S, streptodornase B, Streptokinase, Hyaluronidase"
Toxins (s pyogenes)
"pyrogenic exotoxins A, B, and C"
virulence factors (s agalactiae)
"polysaccharide capsule, hemolysin, c5a peptidase"
virulence factors (enterococcus spp)
lipoteichoic acid
virulence factors (viridans streptococci)
adhesins of unknown composition and specificity
virulence factors (s pneumonia)
"polysaccharide capsule, lipoteichoic acid, peptidoglycan, neuraminidase, pneumolysin, IgA protease, altered penicillin binding proteins"
respiratory tract infections and sequelae (s pyogenes)
"pharyngitis, scarlet fever, suppurative sequelae (tonsilar abcess, retropharyngeal abcess), nonsupurative sequelae (acute rheumatic fever, acute glomerulonephritis)"
other infections (s pyogenes)
"impetigo, ecthyma, cellulitis, erysipelas, toxic shock syndrome"
infections and intoxications (s agalactiae)
"neonatal sepsis/meningitis, postpartum sepsis"
infections and intoxications (s pneumonia)
"pneumonia, bacteremia, meningitis, otitis media, sinusitis"
infections and intoxications (viridans streptococci)
"endocarditis, dental caries"
infections and intoxications (enterococci spp)
"endocarditis, catheter-related sepsis, urinary tract infection"
where does s pyogenes live?
mucous membranes
where does s agalactiae live?
mucous membranes
where does s pneumonia live?
mucous membranes
where does enterococcus spp live?
mucous membranes and skin
where does viridans streptococci live?
mucous membranes
where does s pyogenes preferentially colonize?
upper respiratory tract
where does s agalactiae preferentially colonize?
vagina and upper respiratory tract
where does s pneumonia preferentially colonize?
upper respiratory tract
where does enterococcus preferentially colonize?
GI tract
where does viridans streptococci preferentially colonize?
upper respiratory tract
to which drugs can strep show resistance?
"Penicillin, Ampicillin, Clindamycin, Vancomycin"