bacte lec - Gram-negative Enteric Bacilli

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30 Terms

1

Gram-negative, facultative anaerobe, non-lactose fermenter

Which of the following characteristics is TRUE about Salmonella?

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2

Salmonella typhi

Which Salmonella species is carried only by humans?

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3

Bile

Salmonella typhi can tolerate large concentrations of what substance?

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4

Vi antigen

Which antigen in Salmonella typhi is responsible for its capsule?

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5

Typhoid fever

What disease is caused by Salmonella typhi?

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6

Mouth

What is the portal of entry for Salmonella typhi?

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7

100,000 bacteria

What is the infecting dose for Salmonella typhi?

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8

GallbladderTyphoid fever carriers are individuals who:

What major organ does Salmonella typhi infect before being excreted in stool?

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9

Have no symptoms but continue to excrete bacilli

Typhoid fever carriers are individuals who:

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10

Salmonella typhi

Typhoid Mary was a famous carrier of:

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11

Widal test

What test detects agglutinating antibodies against Salmonella typhi antigens?

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12

Blood

Which specimen is best for detecting Salmonella typhi during the first week of infection?

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13

Alkaline slant, acid butt, no gas, small H2S

In Triple Sugar Iron (TSI) agar, Salmonella typhi produces:

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14

Bacillary dysentery (Shigellosis)

What is the primary disease caused by Shigella?

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15

Shigella dysenteriae

Which Shigella species is the most pathogenic?

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16

Food, Flies, Feces, Fingers

Shigella is transmitted through the 4 F’s, which include:

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17

Shiga toxin

Which virulence factor in Shigella disrupts protein synthesis?

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18

Enterotoxigenic E. coli (ETEC)

Which type of Escherichia coli is responsible for traveler’s diarrhea?

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19

EHEC (O157:H7)

Which Escherichia coli strain is associated with hemorrhagic colitis and hemolytic uremic syndrome?

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20

Eosin Methylene Blue (EMB)

What is the best culture medium for isolating Escherichia coli?

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21

Endotoxin

Salmonella typhi produces which of the following virulence factors?

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22

Reticuloendothelial system

Salmonella is capable of surviving in macrophages and spreading through the body via which system?

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23

It aids in species identification

What is the role of the H antigen in Salmonella?

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24

Contaminated dairy products and poultry

Salmonella gastroenteritis is most commonly acquired from:

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25

Rose spots on the skin

What is a key symptom of typhoid fever during the second week of infection?

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26

Shigella sonnei

Which Shigella species is the most common cause of shigellosis in the United States?

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27

Non-motile

Shigella differs from Salmonella because it is:

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28

100-200 bacteria

What is the infectious dose of Shigella needed to cause disease?

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29

Bloody diarrhea with mucus and pus

What symptom is characteristic of shigellosis?

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30

Enteropathogenic E. coli (EPEC)

Which of the following Escherichia coli strains is associated with infantile diarrhea?

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