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39 Cards in this Set
- Front
- Back
Hyaluronic acid capsule is a characteristic of what organism?
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Streptococcus pyogenes
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What virulence factors are associated with Streptococcus pyogenes?
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M protein (on fimbriae)
Group A-specific C-carbohydrate (composed of rhamnose and N-acetylglucosamine) Protein F (mediates attachment to fibronectin in pharyngeal epithelium) |
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what is the reservoir for Streptococcus pyogenes?
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human skin and mucosa only known reservoir
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Labs for Streptococcus pyogenes?
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gram-positive
bacitracin sensitive catalase-negative |
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What are the major Gram-positive rods?
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Clostridium (anaerobe)
Corynebacterium Listeria Bacillus |
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catalase positive
coagulase positive? |
Stapylococcus aureus
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catalase positive
coagulase negative Novobiocin sensitive |
Staphylococcus epidermidis
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catalase positive
coagulase negative Novobiocin resistant |
Staphylococcus saprophyticus
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labs for Staphylococcus aureus?
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Gram positive
catalase positive coagulase positive |
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labs for Staphylococcus epidermidis?
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Gram positive
Catalase positive coagulase negative Novobiocin sensitive |
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labs for Staphylococcus saprophyticus?
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Gram positive
Catalase positive Coagulase negative Novobiocin resistant |
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Staphylococcus are catalase ______
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positive
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Streptococcus species are catalase _____________
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negative
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Labs for Streptococcus pneumoniae
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Gram positive cocci
Catalase negative α-hemolitic encapsulated (+ quelling) Optochin sensitive bile soluble |
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Labs for Viridans streptococci?
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Gram positive cocci
Catalase negative α-hemolitic no capsule Optochin resistant not bile soluble |
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Labs for Streptococcus pyogenes?
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Gram-positive cocci
Catalase negative β-hemolytic Bacitracin sensitive |
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Labs for Streptococcus agalactiae?
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Gram-positive cocci
Catalase negative β-hemolytic bacitracin resistant |
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Labs for Enterococcus and Peptostreptococcus species?
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Gram-positive cocci
Catalase negative γ-hemolytic |
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How does the TSST-1 toxin exert it's effects?
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Binds nonspecifically and activates T lymphocytes
(toxic shock syndrome toxin produced by Staphylococcus aureus - gram +, catalase-positive) |
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What is the major virulence factor of Staphylococcus aureus?
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Protein A (binds Fc-IgG, inhibiting complement fixation and phagocytosis)
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name two gram negative cocci
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Neisseria meningitidis
Neisseria gonorrhoeae |
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how are Neisseria meningitidis and Neisseria gonorrhoeae differentiated?
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Neisseria meningitidis is a maltose fermenter, Neisseria gonorrhoeae does not ferment Maltose
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Maltose fermenting gram negative cocci
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Neisseria meningitidis
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non-maltose fermenting gram negative cocci
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Neisseria gonorrhoeae
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What are the main gram negative Coccoid rods?
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Haemophilus influenzae
Pasteurella (animal bites) Brucella (brucellosis) Bordetella pertussis |
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fast lactose fermenting gram negative rods
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Klebsiella
E. coli Enterobacter |
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slow lactose fermenting gram negative rods
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Citrobacter
Serratia |
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Gram negative rods
lactose nonfermenting oxidase negative |
Shigella
Salmonella Proteus |
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Gram negative rods
lactose nonfermenting oxidase positive |
Pseudomonas
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Labs for Neisseria meningitidis?
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Gram negative cocci
maltose fermenter |
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Labs for Neisseria meningitidis?
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Gram negative cocci
maltose nonfermenter |
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Labs for Haemophilus influenzae?
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Gram negative coccoid rods
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Labs for Bordetella pertussis?
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Gram negative coccoid rods
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Labs for Kebsiella?
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Gram negative rods
fast Lactose fermenter |
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Labs for E. coli?
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Gram negative rods
fast Lactose fermenter |
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Labs for Shigella?
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Gram negative rods
Lactose nonfermenter Oxidase negative |
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Labs for Salmonella?
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Gram negative rods
Lactose nonfermenter Oxidase negative |
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Labs for Proteus?
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Gram negative rods
Lactose nonfermenter Oxidase negative |
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Labs for Pseudomonas?
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Gram negative rods
Lactose nonfermenter Oxidase positive |