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29 Cards in this Set
- Front
- Back
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Gram Stain
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Positive (blue)
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Shape
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Coccus
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Diamter
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0.5 - 1.5
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Multicellular organization
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cluster
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Appearance on culture plate
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"sharply define, smooth, opaque"
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Culture Media Requirements
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nonselective
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Color of S. aureus culture
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yellow
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Color of S. epidermidis culture
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white
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Metabolism
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facultative anaerobe
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catalase test
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positive
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slide coagulase (s aureus)
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usually positive
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tube coagulase (s aureus)
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positive
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particle agglutination (a aureus)
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positive
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Slide coagulase (coag neg staph)
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"usually negative, otherwise, false positive"
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tube coagulase (coag neg staph)
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negative
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Enzymatic virulence factor (s aureus)
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"catalase, coagulase, hyaluronidase, staphylokinase, lipase, thermostable nuclease, penicillinase"
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Toxin virulence factor (s aureus)
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"membrane-active toxins, panton-valentine leukocidin, exfoliatin, toxic shock syndrome toxin 1, enterotoxins a-e and g"
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Other virulence factors (s aureus)
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"capsule, teichoic acid, protein A"
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Virulence factors (coag neg staph)
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"""slime"", penicillinase"
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Localized infections (s aureus)
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"folliculitis, furuncles, carbuncle, impetigo, cellulitis"
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localized infections with systemic effects (s aureus)
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"scalded skin syndrome, toxic shock syndrome"
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invasive infections (s aureus)
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"endocarditis, pneumonia, osteomyelitis, septic arthritis"
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food poisoning (s aureus)
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food poisoning
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infections (coag neg staph)
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"usually due to introduction of infected foreign bodies: prosthetic valve endocarditis, catheter associated bacteremia, central nervous system shunt infection, prosthetic device associated infection, pritoneal dialysis catheter associated peritonitis, urinary tract infection"
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Where does s aureus live?
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"skin, skin glands, mucous membranes"
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Where does s aureus preferentially colonize?
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the nares
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Where does coagulase negative staph live?
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"skin, skin glands, and mucous membranes"
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Where does coag neg staph preferentially colonize?
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"skin, sudoriferous glands, uroepithelium"
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To which drugs is staph becoming resistant?
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"Oxacillin, Vancomycin, Clindamycin"
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