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35 Cards in this Set
- Front
- Back
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Mannitol salts agar would be used for culturing which organism?
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Staphylococci
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What are the three species of Staphylococci associated with human diseases?
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S. aureus, S. epidermidis, S. saprophyticus
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What molecules from gram positive bacteria are responsible for causing shock?
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peptidoglycan fragments + lipoteichoic acids
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What is the role of protein A in gram positive bacteria?
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binds to Fc portion of IgG, creating anti-opsonin effect
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What is the role of Fibronectin-binding protein in gram positive bacteria?
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promotes binding to mucosal cells
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What is the role of microcapsule in gram positive bacteria?
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anti-phagocytic
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___________ __________ causes clot formation by S. aureus in citrated rabbit plasma
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free coagulase
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Which staphylococci toxins act as superantigens?
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toxic shock syndrome toxin, enterotoxins
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What is the difference between a furuncle and a carbuncle?
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furuncle is a single abscess, carbuncle is multiple furuncles that have coalesced
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An infection of the umbilical cord resulting in scalded skin send is caused by the release of what?
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epidermolytic toxins A and B
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Food poisoning is caused by the release of what following the ingestion of S. aureus is caused by the release of what in the gut?
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Enterotoxins A,B,C,D or G
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Many S. aureus strains are now resistant to methicillin (true/false)
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true
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What are methicillin, nafcillin, and oxacillin?
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penicillinase resistant penicillins
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Which antibiotic would be used first in the treatment of minor skin infections with S. aureus?
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tetracycline
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What enzyme is responsible for penicillin resistance?
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beta-lactamase
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What is the mechanism of S. aureus resistance to methicillin?
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Transpeptidase no longer binds methicillin
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Which antibiotic is reserved for treatment of serious infections, including Hospital Acquired MRSA?
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vancomycin
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What is the first-line treatment for community acquired MRSA?
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trimethoprim/sulfoxazole
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MRSA is often transmitted by direct contact with an infected person (true/false)
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true (wash your damn hands for Christ's sake!)
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What species of staph is likely to be acquired through catheters?
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S. epidermidis
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What species of Staph is likely to be responsible for a UTI?
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S. saprophyticus
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Identify the Organism
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Streptococcus
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Identify the Organism
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Staphylococcus
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Which species of Streptococcus is classified by beta hemolysis, Lancefield group A and a Bacitracin S test?
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S. pyogenes
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Which species of Streptococcus is classified by beta hemolysis, Lancefield group B and a Hippurate hydrolisis test?
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S. agalactiae
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Which species of Streptococcus is classified by Gamma hemolysis, Lancefield group D and a Bile esculin test?
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S. faecalis
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Which species of Streptococcus is classified by alpha hemolysis, and a postive quelling test?
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S. pneumoniae
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__________ infections are abscesses, __________ infections are spreading
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Staph, Strep
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Which bacterial species is known to produce scarlet fever?
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Grp A Streptococcus (pyogenes)
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What is the treatment for Streptococci infection?
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penicillin
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Which Strep is known to cause subacute endocarditis?
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Viridans strep
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What diseases are commonly caused by Streptococcus pneumoniae?
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pneumonia, sinusitis, otitis media
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___________ ____________: oxidase positive, grow at 42 degrees C, colonies produce a fruity odor
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Pseudomonas aeruginosa
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What species produces exotoxin A? What does it do?
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Pseudomonas aeruginosa; Causes ADP-ribosylation of elongation factor 2 thereby inhibiting protein synthesis; Eschar formation w/ tissue necrosis (gangrene)
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___________: Oxidase negative (aerobic), nonfermentative, nonmotile, pleomorphic organisms
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Acinetobacter
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