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24 Cards in this Set
- Front
- Back
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characteristics of the genera |
gpc in chains that tend to elongate colonial morphology: small, round, smooth, shiny, more translucent and not as white as Staph fastidious, facultative anaerobes catalase -
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antigenic structure |
C carbohydrate in cell wall, Lancefield typing (Group Strep A-V), viridans don't have this M protein to help evade immune system and phagocytosis, related to virulence |
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Gamma isolates |
Streptococcus viridans group Enterococcus Streptococcus Group D Non-Enterococcus |
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Streptococcus viridians group |
BE - Normal flora: mouth and vagina causes: Subacute bacterial endocarditis (SBE) from dental procedures fever, malaise, fatigue, weight loss, mild pain, anemia, petechiae, Janeway lesions, Roth spots, heart murmur |
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treatment of Streptococcus viridans group |
Penicillin |
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Enterococcus |
BE + 6.5 % NaCl + Normal Flora: intestine Diseases: Bacteremia and Edocarditis Wound Infections UTI (what they mostly cause) |
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treatment of Enterococcus |
B-Lactamase -: Ampicillin B-Lactamase +: Vancomycin |
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Streptococcus Group D Non-Enterococcus
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Streptococcus bovis BE + 6.5 % NaCl - Rare in humans Endocarditis |
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treatment of Streptococcis Group D Non-Enterococcus |
Penicillin |
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Alpha Isolates |
Streptococcus pneumonia Streptococcus viridans group |
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Streptococcus pneumonia |
BE - 6.5 % NaCl - Optichin + Lancet-shaped gpdc with large capsules mucoid colony: flattens with age, looks like checker normal flora: oral cavity in small numbers
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Streptococcus pneumonia diseases and prevention |
Lobar pneumonia Meningitis Otitis media Bacteremia vaccine |
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Streptococcus pneumonia treatment |
Penicillin Ciprofloxacin Vancomycin |
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Streptococcus viridans group |
BE - Optochin _ Alpha form most common S. mutans and S. sanguis: associated with dental carries |
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Beta isolates |
Group D Enterococus Streptococcus Group A Streptococcus Group B Beta-Hemolytic Streptococci Not Group A, B, D others |
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Group D Enterococcus |
very rare BE + |
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Streptococcus Group A |
Streptococcus pyogenes normal flora: oral cavity in small numbers extracellular products: streptokinase, streptodornase, hyaluronidase, erythrogenic toxin, hemolysins |
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Streptococcus Group A diseases |
Strep throat Scarlet Fever Erysipelas, cellulitis Impetigo Wound Infections Pyogenic Strep A infections: necrotizing fasciitis, toxic shock- like syndrome post-steptococcal diseases (sequelae): acute glonerulonephritis, Rheumatic fever |
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Streptococcus Group A agar and Treatment |
SXT agar: isolates Strep A really well Penicillin Erythromycin |
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Streptococcus Group B |
Streptococcus agalactiae normal flora: oral cavity, may colonize vagina
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Streptococcus Group B infections in Neonates |
test as soon as you know are pregnant and closer to birth high mortality rates meningitis and sepsis respiratory distress syndrome (RDS) |
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Streptococcus Group B treatment |
Penicillin |
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Beta-Hemolytic Streptococci Not Group A, B, D |
in oral cavity Group C most common, then F then G Treatment: penicillin may cause infections similar to Group A |
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other related Catalase Negative, GPC |
Leuconostoc: similar morphologically and biochemically to Enterococcus, opportunist, intrinsic resistance to vancomycin Aerococcus Gemella Pediococcus Lactococcus Nutritionally variant streps: Abiotrophia, Granulicatella |
