bacte lec - vibrio and other gram-negative bacilli

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30 Terms

1

Vibrio cholerae

Which of the following is NOT considered a gram-negative enteric bacillus?

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2

2

Toxigenic Vibrio cholerae is divided into how many epidemic serotypes?

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3

Parahaemolyticus

Which of the following is NOT a serotype of Vibrio cholerae O1?

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4

Positive (+)

What is the primary distinguishing feature of El tor biotype in the Voges-Proskauer test?

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5

El tor

Which biotype of Vibrio cholerae is resistant to Polymyxin B?

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6

Comma

What shape does Vibrio cholerae exhibit?

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7

Increases adenylate cyclase activity

What is the major function of the cholera toxin (choleragen)?

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8

A & C

What antigenic components are present in the Inaba serotype?

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9

10M bacilli (10⁶ – 10¹¹ CFU)

What is the infectious dose of Vibrio cholerae?

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10

Contaminated water and food

What is the main mode of transmission for Vibrio cholerae?

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11

Rice-water stool

What type of stool is characteristic of cholera?

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12

Gastroenteritis

What condition is commonly caused by Vibrio parahaemolyticus?

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13

Tellurite Taurocholate Gelatin Agar (TTGA)

Which medium is preferred for the culture of Vibrio cholerae?

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14

Humans

What is the primary reservoir of Vibrio cholerae?

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15

It causes rapidly progressive wound infections

What is a major characteristic of Vibrio vulnificus?

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16

Green colonies

Which feature differentiates Vibrio parahaemolyticus from Vibrio cholerae on TCBS agar?

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17

4-30 hours

What is the incubation period of Vibrio parahaemolyticus?

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18

Urease

What is the major virulence factor of Helicobacter pylori that helps it survive in the stomach?

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19

Urease breath test

Which diagnostic test is commonly used to detect Helicobacter pylori?

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20

Skirrow’s medium

Which medium is best for isolating Campylobacter species?

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21

Bloody diarrhea

Which of the following is a common symptom of Campylobacter jejuni infection?

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22

42°C

What is the optimal growth temperature for Campylobacter jejuni?

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23

Campylobacter grows at 42°C

What distinguishes Campylobacter jejuni from Helicobacter pylori?

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24

Skin infection

Which of the following is NOT a clinical manifestation of Helicobacter pylori infection?

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25

Lophotrichous flagella

Which of the following is a characteristic of Helicobacter pylori?

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26

It is a common cause of diarrhea

Which of the following statements is true about Campylobacter jejuni?

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27

C. jejuni causes diarrhea, while C. intestinalis causes bacteremia

What is the major difference between Campylobacter jejuni and Campylobacter intestinalis?

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28

Oxidase test

Which test is used to differentiate Vibrio species from other gram-negative bacilli?

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29

Comma-shaped

Which of the following is a key characteristic of Vibrio species?

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30

Intravenous fluids and electrolytes

What is the primary treatment for cholera?

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