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Microbiology > Gram Positive Rods > Flashcards

Gram Positive Rods Flashcards

1
Q 
Spore forming
Non motile 
Box cars
nonhemolytic
Catalase +
A

Bacillus anthracis

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2
Q 
Spore forming 
Motile
Beta hemolytic 
Penicillin R
Frosted glass appearance
A

Bacillus cereus

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3
Q 
Spore forming 
Motile
Gamma hemolytic
Catalase +
Oxidase +
A

Bacillus subtilis

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4
Q 
Non spore forming 
Oxidase -
Irregular shape
Catalase +
Chinese letters
Pinpoint yellow
Metachromatic granules
A

Corynebacterium diphtheriae

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5
Q 
Non spore forming 
Oxidase-
H2S +
Vancomycin R
Catalase -
Pinpoint clear
A

Erysipelothrix rhusiopathiae

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6
Q 
Nonspore forming
H2S -
Catalase +
Bile esculin +
CAMP +
Oxidase -
VP +
Tumbling motility / umbrella 
Clear white small 
Beta hemolytic
A

Listeria monocytogenes

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7
Q 
Non spore forming 
H2S -
Catalase - 
Oxidase -
Hippurate +
A

Gardnerella vaginalis

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8
Q

what organism is the Elek test done on?

A

C. diphtheriae

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9
Q

what does the Elek test determine?

A

toxin production

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10
Q

why do C. dipthheriae turn black on Tinsdale?

A

tellurite hydrolysis

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11
Q

what organism produces a pseudomembrane on tonsils, uvula, or soft pallate?

A

C. diphtheriae

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12
Q

what are key characterisitics of Erysipelothrix?

A

catalase -

H2S +

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13
Q

what are Erysipelothrix infections most commonly associated with?

A

roses

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14
Q

medusa head colonies

A

B. anthracis

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15
Q

what bacillus spp is nonhemolytic?

A

B. anthracis

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16
Q

Catalase +
urea -
palisades

A

C. jeikeium

17
Q 
Catalase +
partially acid fast
slow growing
SBA- wrinkled, dry chalky white - orange tan
beta hemolytic
18
Q

B. cereus infections

A

local and systemic

food poisoning

19
Q

listeria infections

A

meningitis & septicemia in newborns

food poisoning

20
Q

nocardia infections immunocompetent

A

skin infections

21
Q

nocardia infections immunocompromised

A

invasive pulmonary & disseminated infections

22
Q

Gray black colonies on Tinsdale

A

C diphtheriae

23
Q

Beaten egg white consistency

A

Bacillus anthracis

24
Q

Oxidase +

25
Q

Catalase -

A

Erysipelothrix

Gardernella

Microbiology (17 decks)

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