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Elsevier Bacteriology (RVSP) > 10. Miscellaneous Enteric Pathogens > Flashcards

10. Miscellaneous Enteric Pathogens Flashcards

1
Q

Oxygen requirements for Campylobacter spp.

A

Microaerophilic

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2
Q

Temperature where Arcobacter spp. grow

A

15-30°C

Variable form: 35-42°C

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3
Q

Oxygen requirements for Arcobacter spp.

A

Aerobic

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4
Q

Disease caused by Campylobacter jejuni

A

Food-borne gastroenteritis

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5
Q

What structure in the GI tract does C. jejuni attach to?

A

Gut enterocytes

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6
Q

Toxins released by C. jejuni

A

Enterotoxin

Cytotoxin

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7
Q

Temperature for growth of C. jejuni

A

42°C

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8
Q

Atmospheric conditions for growth of C. jejuni

A

5% O2
10% CO2
85% N2

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9
Q

Media used for C. jejuni

A

Campy blood agar

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10
Q

Other selective media for C. jejuni

A
  • Cefoperazone Vancomycin Amphotericin (CVA)

- Skirrow Medium

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11
Q

Microscopic appearance of C. jejuni

A

Curved gram-negative bacilli

Sea gull shape

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12
Q

Colony morphology C. jejuni

A

Flat
Gray
Mucoid
Nonhemolytic colonies

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13
Q

Oxidase reaction of C. jejuni

A

Oxidase positive

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14
Q

Catalase reaction of C. jejuni

A

Catalase positive

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15
Q

Motility of C. jejuni in wet preparation

A

Darting motility

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16
Q

Hippurate hydrolysis reaction of C. jejuni

A

Hippurate hydrolysis positive

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17
Q

Bacteria that was previously classified as Vibrio and shares ecology of the family Vibrionaceae

A

Photobacterium damselae

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18
Q

Oxidase reaction of the Vibrio family

A

Oxidase positive

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19
Q

Oxygen requirements of the Vibrio family

A

Facultative anaerobe

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20
Q

Microscopic appearance of the Vibrio family

A

Gram-negative bacilli

Comma-shaped cells

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21
Q

The zooplankton which Vibrio cholerae is primarily attached to

22
Q

When V. cholerae colonizes the GI tract, it attaches to the

A

Villi using its pili

23
Q

Two-part toxin produced by V. cholerae

A

Cholera toxin

24
Q

Clinical disease caused by V. cholerae

25
Q

Lactose fermentation characteristics of V. cholerae

A

Non-lactose fermenter

26
Q

Color of V. cholerae on TCBS agar

A

Yellow-green colonies

27
Q

Oxidase reaction of V. cholerae

A

Oxidase positive

28
Q

Catalase reaction of V. cholerae

A

Catalase positive

29
Q

String test reaction of V. cholerae

A

String test positive

30
Q

Enumerate the halophilic Vibrio organisms

A

V. parahaemolyticus
V. vulnificus
V. alginolyticus

31
Q

Disease caused by V. parahaemolyticus

A

Gastroenteritis from seafood

32
Q

Disease caused by V. vulnificus

A

Septicemia from raw shellfish (lactose fermenter)

33
Q

Disease caused by V. alginolyticus

A

Wound and ear infections

34
Q

Cytotoxic enterotoxin produced by Aeromonas hydrophila

35
Q

Hemolysis characteristics of Aeromonas hydrophila

A

β-hemolysis

36
Q

Microscopic appearance of Aeromonas hydrophila

A

Gram-negative bacilli (straight)

37
Q

Lactose fermentation characteristics of A. hydrophila

A

Lactose fermenter

38
Q

Oxidase reaction of A. hydrophila

A

Oxidase positive

39
Q

Indole reaction of A. hydrophila

A

Indole positive

40
Q

Associated with gastric cancer

A

Helicobacter

41
Q

Produced by Helicobacter; converts urea to ammonia and bicarbonate

42
Q

Functions of ammonia

A
  • neutralizes stomach acid

- toxic to epithelial cells

43
Q

Enzymes produced by Helicobacter

A
  • protease
  • catalase
  • phospholipases
44
Q

Oxygen requirements of Helicobacter

A

Microaerophilic (5% O2, 10% CO2, 85% N2)

45
Q

Temperature requirements for Helicobacter

A

35°C with high humidity

46
Q

Oxidase reaction of Helicobacter

A

Oxidase positive

47
Q

Catalase reaction of Helicobacter

A

Catalase positive

48
Q

Urease reaction of Helicobacter

A

Urease positive

49
Q

The urease produced by Helicobacter converts urea to

A

Ammonia

Bicarbonate

50
Q

Genera under miscellaneous enteric pathogens

A

Campylobacter
Vibrio
Aeromonas
Helicobacter

Elsevier Bacteriology (RVSP) (34 decks)

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