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22 Cards in this Set
- Front
- Back
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S. Aureus is coagulase?
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positive
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S. Aureus colonies are what color?
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golden yellow
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Can S aureus ferment mannitol?
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Yes sir
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What species of staph are novobiocin sensitive?
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aureus and epidermis
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What are the virulence factors of S. aureus?
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Petidoglycan, Teichoic acid, Protein A, fibronectin protein, bound coagulase, micro-capsule
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Staphylococcus? gram stain? aerobes or anaerobes?
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gram positive facultative anaerobes
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What color colonies are S. epidermis?
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white
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Can s. saprophyticus or epidermis ferment mannitol?
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NO
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Can gram positive bacteria cause shock?
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Yes! but wait i thought only gram negative can? no silly, they both can...look at peptidoglycan and teichoic acid
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What receptors on macrophages recognize petidoglycan and teichoic acid fragments?
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TLR 2 and 6
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Protein A has what effect as a virulence factor?
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anti-opsonin
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What structural virulence factor is involved in abcess formation?
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coagulase
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If you see a gram positive cocci that's catalase positive, what's the most likely diagnosis?
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staph aureus, duhh
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A distiguinishing factor most strains of MRSA is?
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its panton valentine positive
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How would you treat a minor staph infection?
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tetracycline
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If someone was seriously ill with a staph infection, how would you treat them?
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aspirate the abcess, gram stain and blood culture, tx with penicillinase resistant penicillins
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how do methicillin resistant strains gain...resistance?
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modify transpeptidase causes it not to bind to the methicillin
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what drug is reserved for noscomial mrsa infections?
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vancomycin
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whats the most common mrsa strain?
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USA300
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s. epidermidis mainly infects?
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iv caths, heart valves, prosthetic joints
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true or false s. aureus is the most resistant?
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false, s. epidermidis is more resistant to antibiotics
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s. saprophyticus mainly causes what/
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UTI in females
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