Lab diagnosis Enterobacteriaceae Flashcards

1
Q

Which staining technich is use to visualize Yersinia SPP. With a Bipolar appearance

A

Wayson stain

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2
Q

Which agar is use to differentiate sorbitol-negative E. coli O157:H7?

A

McConkey Sorbitol Agar

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3
Q

Which of the following media is not highly selective for the isolation of salmonella SOP?

A

McConkey Agar

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4
Q

Which of biochemical test is used to determine the ability of an organism to utilize sodium citrate?

A

Citrate utilization

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5
Q

Which of the following agar us specifically used for the isolation of Y. Enterocolitica

A

Cefsulodin-irgasan-novobiocin agar

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6
Q

What is the characteristic appearance of colonies of Y. Pestis on 5% sheep blood agar?

Rough and cauliflower appearance at 48hours

A

Rough and cauliflower appearance at 48hours

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7
Q

Which agar is used for the isolation of Shigella app. And Salmonella spp.?

A

Salmonella-shigella agar

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8
Q

Which of the following is NOT a component of lysine Iron Agar (LIA)?

A

Glucose

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9
Q

What does a blackening of the butt indicate in lysine Irene Agar (LIA)?

A

Production of H2S gas

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10
Q

Which test is used to determine the ability of an organism to deaminate phenylalanine?

A

Phenylalanine deaminate test

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11
Q

What color indicates a positive result for indole production in the sulfide-indole-motility (SIM) test?

A

Red

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12
Q

Which medium ability is used to determine the ability if an organism to reduce nitrate to nitrite?

A

Nitrate broth

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13
Q

Which organism is commonly used as positive control for the Methyl Red test?

A

Escherichia coli

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14
Q

What does a red color indicate in the Voges- Proskauer test?

A

Presence of acetoin

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15
Q

Which medium is used for the isolation of Yershinia enterocolitica?

A

Cefsulodin-irgasan-novobiocon agar

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16
Q

Which biochemical test is used to determine the ability if an organism to hydrolyze urea?

A

Urea hydrolysis test

17
Q

What is the characteristic appearance of colonies of Salmonella spp. on Brilliant green agar?

A

White to pink or red colonies

18
Q

Which test is used to determine the ability of an organism to ferment glucose and lactose or sucrose?

A

Triple sugar iron agar test

19
Q

What color indicates a positive result for lysine deamination in Lysine Iron Agar (LIA)?

A

Red

20
Q

Which medium is used for the isolation of Salmonella spp. and Shigella spp.?

A

Salmonella-Shigella agar

21
Q

Which agar is used to differentiate sorbitol-negative E. coli O157:H7?

A

McConkey Sorbitol agar

22
Q
A