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Microbiology > Enterobacteraceae > Flashcards

Enterobacteraceae Flashcards

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Biology 101 flashcards
0
Q

ONPG (+)

VP (-)

A

Escherichia coli
Shigella sonnei
Citrobacter
Yersinia

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1
Q

ONPG (+)

VP (+)

A 
Klebsiella
Enterobacter
Serratia
Hafnia alvei
Raoultella ornitholytica
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2
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A 
Proteus 
Morganella
Providenia
Salmonella spp.
Shigella
Edwardsiella tarda
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3
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ONPG (+)
VP (+)
ADH (+)

A

Enterobacter cloacae

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4
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ONPG (+)
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LDC (-)

A

Enterobacter cloacae

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5
Q

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ODC (-)

A

Klebsiella pneumoniae

Klebsiella oxytoca

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6
Q

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GEL (+)

A

Serratia marcescens

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7
Q

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Indole (+)

A

Klebsiella oxytoca

Raoultella ornitholytica

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8
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Hafnia alvei

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9
Q

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H2S (+)

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Citrobacter freundii

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10
Q

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Citrate (+)

A

Citrobacter

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11
Q

ONPG (+)
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ODC (-)

A

Citrobacter freundii

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12
Q

ONPG (-)
VP (-)
H2S (+)

A

Proteus
Salmonella
Edwardsiella

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13
Q

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ODC (+)

A

Proteus mirabilis
Morganella morganii
Salmonella spp.
Edwardsiella tarda

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14
Q

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VP (-)
LDC (+)

A

Salmonella spp.

Edwardsiella tarda

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15
Q

ONPG (-)
VP (-)
Urea (+)

A

Proteus mirabilis
Proteus vulgaris
Morganella morganii

16
Q

Inostitol (+)

A

Providencia stuartii

17
Q

Inostitol (-)

A

Providencia alcalifaciens

18
Q

What are the general characteristics of enterobacteriaceae?

A
  • Ferment glucose
  • Reduce nitrates to nitrites
  • Oxidase negative
  • Grow on MacConkey agar
19
Q

All enterobacteriaceae are motile except…

A

Klebsiella, Shigella, Yersinia

20
Q

What type of arrangement is the flagella?

A

Peritrichous

21
Q

R factors

A

Transfer resistance

22
Q

O antigen

A

Somatic antigen
Heat stable
Located on the LPS of cell wall (endotoxin production)

23
Q

How much O antigen does rough dry colonies have?

A

Small amount of O antigen

24
Q

How much O antigen do smooth colonies have?

A

Large amounts

25
Q

H antigen

A

Flagellar antigen

Heat labile

26
Q

K (Vi) antigen

A

Capsular antigen

Heat labile

27
Q

What is the sole carbohydrate in MAC agar?

A

Lactose

28
Q

Fermentation

A

Able to utilize glucose or other carbohydrates in the absence of oxygen by using an organic molecule as a final electron acceptor

29
Q

What causes an organism to be a late lactose fermentor?

A

B-galactosidase, but lack permease so it takes longer for extracellular lactose to move intracellularly

Microbiology (3 decks)

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