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Microbiology:Bacteriology > Gram Positive Cocci > Flashcards

Gram Positive Cocci Flashcards

1
Q

Arrangement of Staphylococcus

A

clusters

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2
Q

best sample for Staphylococcus

A

aspirates

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3
Q

hemolytic pattern of Staphylococcus

A

beta-hemolytic

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4
Q

culture media for Staphylococcus

A

BAP
MSA
PEA
CNA

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5
Q

units of bacitracin

A

0.04u

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6
Q

resistant to bacitracin

A

Staphylococcus

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7
Q

units of furazolidone

A

100ug

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8
Q

resistant to furazolidone

A

Micrococcus

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9
Q

positive to modified oxidase test

A

Micrococcus

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10
Q

resistant to lysostaphin test

A

Micrococcus

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11
Q

positive for furoxone-tween 80 oil red o

A

Micrococcus

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12
Q

positive to glycerol with erythromycin

A

Staphylococcus

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13
Q

positive OF test (Fermentation)

A

Staphylococcus

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14
Q

yellow colonies in MSA

A

Staphylococcus aureus

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15
Q

components of MSA

A

1% mannitol
7.5% NaCl
phenol red

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16
Q

other name of scalded skin syndrome

A

Ritter’s syndrome

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17
Q

cause of toxic shock syndrome

A

enterotoxin F

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18
Q

best single criterion for pathogenicity in Staphylococcus

A

coagulase test

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19
Q

plasma used for coagulase test

A

rabbit plasma in EDTA

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20
Q

heat stable toxin

A

enterotoxin/neurotoxin

causes vomitting, heat stable, targets T cells

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21
Q

enterotoxin causing foodpoisoning

A

enterotoxin A,B,D

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22
Q

enterotoxin causing pseudomembranous enterocolitis

A

enterotoxin B

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23
Q

toxin causing Toxic shock syndrome

A

enterotoxin F

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24
Q

leukocidin

A

Panton-Valentine

25
Q

action of leukocidin

A

targets WBCs

causes delta hemolysis

26
Q

antiphagocytic component of cell wall of Staphylococcus

27
Q

biochemical tests for Staphylococcus aureus

A

TELLURITE GLYCINE: black
VP: pos
DNASE: pos (methyl green dye)
PYR: neg

28
Q

mode of attachment of S. epidermidis

A

poly-Y-DL-glutamic acid

29
Q

novobiocin resistant Staphylococcus

A

Staphylococcus saprophyticus

30
Q

Staphylococcus associated to endocarditis

A

Staphylococcus ludenensis

31
Q

confers S. lugdinensis resistance to oxaillin

A

Mec A gene

32
Q

tests that will differentiate coagulase positive staphylococci

33
Q

gold standard for MRSA detection

A

PCR

nucleic acid probes

34
Q

Smith and Brown

A

hemolytic pattern

35
Q

Lancefield

A

extraction of C carbohydrate

36
Q

Academic/Bergey’s

A

temperature

37
Q

flesh eating bacteria

A

Streptococcus pyogenes

38
Q

antiphagocytic component of S. pyogenes

39
Q

Epithelial cell attachment for S. pyogenes

40
Q

respiratory attachment for S. pyogenes

A

lipotechoic acid

41
Q

causes rash in scarlet fever

A

Exotoxin B

42
Q

Streptolysin O Characteristics

A

labile
subsurface
WBC, platelet, tissue cells
stab in BAP

43
Q

Streptolysin S characteristics

A

stable
surface
WBC

44
Q

Bacitracin susceptible Streptococcus

A

Streptococcus pyogenes

45
Q

common cause of neonatal meningitis

A

S. agalactiae

46
Q

CAMP test reaction of Streptococcus agalactiae

A

arrowhead hemolysis

47
Q

5 Groups of viridans streptococci

A 
S. mitis
S. mutans
S. salivarius
S. bovis
S. anginosus
48
Q

most commonly isolated viridans streptococci

49
Q

D antigen positive streptococci

A

Enterococci

50
Q

Enterococcus faecalis

A

most common isolate

51
Q

requires cyanocobalamin for growth

A

Enterococcus faecalis

52
Q

cause of lobar pneumonia

A

Streptococcus pneumoniae

53
Q

most common cause of bacterial meningitis in adults

A

Streptococcus pneumoniae

54
Q

colonial morphology of young Streptococcus pneumoniae

A

dome shape

55
Q

colonial morphology of old Streptococcus pneumoniae

A

coin with raised rim

donut colonies

56
Q

nutritionally variant streptococci

A

Abiotrophia
Granulicatella

*they need B6, cystine, pyridoxal

57
Q

pyridoxal producing bacteria

A

E. coli
Klebsiella
Enterobacter
Yeasts

58
Q

Streptococci-like microorganisms

A 
Aerococcus- vancomycin S
Gemella-easily decolorized
Lactococcus
Leuconostoc-cross reacts with Lancefield D
Pediococcus- grow at 45 degrees

Microbiology:Bacteriology (10 decks)

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