Streptococci and Enterococci Flashcards

1
Q

alpha hemolytic?

A

green halos

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2
Q

beta hemolytic?

A

clear zone

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3
Q

gamma hemolytic

A

no effect

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4
Q

most common cause of otitis media?

A

streptococci pneumonia

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5
Q

what causes endocarditis?

A

Enterococcus faecalis
Streptococcus pneumoniea
streptococus mutans
streptococcus bovis

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6
Q

test to differ between staph and strep?

A

Catalase test
staph produce catalase therefore positive
strep. is catalase negative

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7
Q

what is associated with neonatal sepsis, GU (genourinary), and meningitis?

A

S. agalactiae

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8
Q

what causes urinary tract infections?

A

Staphylococcus saprophyticus

and enterococcus faecalis

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9
Q

what is coagulase test for?

A

to differentiate between members of the genus staphylococcus
staphylococcus aureus vs. staphylococcus epidermidis

epidermides is negative
aureus is positive

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10
Q

what disease does streptococcus pyogenes cause?

A

strep throat, fasciitis

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11
Q

what disease does streptococcus agalactiae cause?

A

neonatal sepsis, meningitis, GU (genitourinary)

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12
Q

what disease does streptococcus bovis cause?

A

endocarditits, gastrointestinal (GI)

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13
Q

what disease does streptococcus pneumoniae cause?

A

pneumonia, meningitis, and otitis media (OM)

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14
Q

what disease does streptococcus mutans cause?

A

endocarditis and caries

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15
Q

what disease does enterococcus faecalis cause?

A

endocarditis, and urinary

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16
Q

what is M protein?

A

antiphagocytic and forms a coat that interferes with complement binding

17
Q

define antigenic

A

elicits immune response

18
Q

function of IgAse?

A

destroys sIgA

19
Q

what does step pyogenes C5a peptidase do?

A

cleaves C5a protein that opsinizes cell for phagocytosis

20
Q

what are the streptococcus pyrogenic exotoxins?

A

SPE-A, SPE-B. SPE-C

SPE-A and SPE-C are superantigens

21
Q

what causes scalded skin syndrome?

A

staphylococcus aureus by exfoliative toxins A and B

22
Q

whate are enterotoxins?

A

food poisoning, superantigen

23
Q

impetigo is commonly caused by?

A

staphylococcus auerus

24
Q

what causes acute rheumatic fever?

A

streptococcus pyogenes

25
Q

M protein is found in which bacteria?

A

streptococcus pyogenes

26
Q

caougulase distinguishes between what genus?

A

staphylococcus

staph. aureus (positive) vs staph. epidermides (neg)

27
Q

what shape is streptococcus pneumonia?

A

Diplococcus

28
Q

what are post streptococcal sequela?

A

acute rhuematic fever and acute glomerulonephritis