10. Miscellaneous Enteric Pathogens Flashcards Preview

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Flashcards in 10. Miscellaneous Enteric Pathogens Deck (50):
1

Oxygen requirements for Campylobacter spp.

Microaerophilic

2

Temperature where Arcobacter spp. grow

15-30°C
Variable form: 35-42°C

3

Oxygen requirements for Arcobacter spp.

Aerobic

4

Disease caused by Campylobacter jejuni

Food-borne gastroenteritis

5

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

Gut enterocytes

6

Toxins released by C. jejuni

Enterotoxin
Cytotoxin

7

Temperature for growth of C. jejuni

42°C

8

Atmospheric conditions for growth of C. jejuni

5% O2
10% CO2
85% N2

9

Media used for C. jejuni

Campy blood agar

10

Other selective media for C. jejuni

- Cefoperazone Vancomycin Amphotericin (CVA)
- Skirrow Medium

11

Microscopic appearance of C. jejuni

Curved gram-negative bacilli
Sea gull shape

12

Colony morphology C. jejuni

Flat
Gray
Mucoid
Nonhemolytic colonies

13

Oxidase reaction of C. jejuni

Oxidase positive

14

Catalase reaction of C. jejuni

Catalase positive

15

Motility of C. jejuni in wet preparation

Darting motility

16

Hippurate hydrolysis reaction of C. jejuni

Hippurate hydrolysis positive

17

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

Photobacterium damselae

18

Oxidase reaction of the Vibrio family

Oxidase positive

19

Oxygen requirements of the Vibrio family

Facultative anaerobe

20

Microscopic appearance of the Vibrio family

Gram-negative bacilli
Comma-shaped cells

21

The zooplankton which Vibrio cholerae is primarily attached to

Copepods

22

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

Villi using its pili

23

Two-part toxin produced by V. cholerae

Cholera toxin

24

Clinical disease caused by V. cholerae

Cholera

25

Lactose fermentation characteristics of V. cholerae

Non-lactose fermenter

26

Color of V. cholerae on TCBS agar

Yellow-green colonies

27

Oxidase reaction of V. cholerae

Oxidase positive

28

Catalase reaction of V. cholerae

Catalase positive

29

String test reaction of V. cholerae

String test positive

30

Enumerate the halophilic Vibrio organisms

V. parahaemolyticus
V. vulnificus
V. alginolyticus

31

Disease caused by V. parahaemolyticus

Gastroenteritis from seafood

32

Disease caused by V. vulnificus

Septicemia from raw shellfish (lactose fermenter)

33

Disease caused by V. alginolyticus

Wound and ear infections

34

Cytotoxic enterotoxin produced by Aeromonas hydrophila

Aerolysin

35

Hemolysis characteristics of Aeromonas hydrophila

β-hemolysis

36

Microscopic appearance of Aeromonas hydrophila

Gram-negative bacilli (straight)

37

Lactose fermentation characteristics of A. hydrophila

Lactose fermenter

38

Oxidase reaction of A. hydrophila

Oxidase positive

39

Indole reaction of A. hydrophila

Indole positive

40

Associated with gastric cancer

Helicobacter

41

Produced by Helicobacter; converts urea to ammonia and bicarbonate

Urease

42

Functions of ammonia

- neutralizes stomach acid
- toxic to epithelial cells

43

Enzymes produced by Helicobacter

- protease
- catalase
- phospholipases

44

Oxygen requirements of Helicobacter

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

45

Temperature requirements for Helicobacter

35°C with high humidity

46

Oxidase reaction of Helicobacter

Oxidase positive

47

Catalase reaction of Helicobacter

Catalase positive

48

Urease reaction of Helicobacter

Urease positive

49

The urease produced by Helicobacter converts urea to

Ammonia
Bicarbonate

50

Genera under miscellaneous enteric pathogens

Campylobacter
Vibrio
Aeromonas
Helicobacter