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POSTMIDTERM:LHE BACTE > Chalter 34: Campylobacter and Helicobacter spp. > Flashcards

Chalter 34: Campylobacter and Helicobacter spp. Flashcards

1
Q

Shape

A

-Slender, curved, rods
-gull-winged and spiral forms

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2
Q

Motility

A

Motile with polar flagella

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3
Q

Type of bacteria

A

Gram-negative

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4
Q

Size

A

0.2 to 0.5 um

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5
Q

Daughter cells appearance

A

-Gull-winged
-long spirals (formed by joined cells)

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6
Q

Environment

A

Microaerophilic

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7
Q

Requirement

A

-fastidious
-enriched media with
-atmosphere of increased CO2 and decreased oxygen tension

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8
Q

MacConkey agar

A

Many spp. grow on MacConkey agar

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9
Q

-oxidase
-catalase
-Fermentation

A

-positive
-variable
-non-fermentative

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10
Q

Found in

A

-Intestinal tracts of domestic animals
-Genital tracts of domestic animals

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11
Q

Principal disease conditions:

A

Either:
-intestinal (presenting as diarrhea)
-genital (infertility or abortion)

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12
Q

Previously classified in the genus

A

Vibrio

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13
Q

Term ‘vibriosis’ retained for some disease in Campylobacter

A
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14
Q

Spp. of vet importance:

A

-C. fetus subsp. venerealis
-C. fetus subsp. fetus
-C. jejuni subsp. jejuni

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15
Q

Established human pathogen. May have zoonotic potential

A

Order: Campylobacterales
Genus: Helicobacter
Specie: H. pylori

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16
Q

Usual habitat

A

Commensals in the intestinal tracts of warm-blooded animals

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17
Q

-Colonize intestines of birds
-Results in fecal contamination of water courses and stored food

A

-Campylobacter jejuni
-Campylobacter lari

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18
Q

Many Campylobacter is excreted in feces

A
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19
Q

Adapted principally to bovine preputial mucosa

A

Campylobacter fetus subsp. venerealis

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20
Q

Campylobacter are strictly microaerophilic

A
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21
Q

Atmosphere requirement

A

: 5 to 10% oxygen
: 1 to 10% CO2

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22
Q

Primary isolation

A

Skirrow agar (selective enriched medium)

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23
Q

Differentiation is based on:

A

-colonial morphology
-certain cultural,
-biochemical,
-antibiotic-susceptibility characteristics
-phenotyping methods are also increasingly used

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24
Q

Colonial morphology:
-C. fetus subsp. venerealis
-C. fetus subsp. fetus

A

-small, round, smooth, translucent colonies
-with dewdrop appearance

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25
Q

Colonial morphology:
-C. jejuni

A

-small, flat, grey colonies
-with a spreading, watery appearance

26
Q

Some Campylobacter are slightly pigmented

A
27
Q

Campylobacter do not ferment carbohydrates

A
28
Q

Pathogenesis and pathogenicity
-C. fetus subsp. venerealis
-C. fetus subsp. fetus

A

-structurally unusual
-Posses a micro capsule or S layer

29
Q

Arranged in lattice formation

A

Microcapsule or S layer

30
Q

S layer confers resistance to

A

-serum-mediated destruction
-phagocytosis
-enhances survival in the genital tract

31
Q

Major outer membrane protein that acts as an adhesin found in:

A

-C. jejuni
-C. fetus subsp. fetus
-C. fetus subsp. venerealis

32
Q

Other genes encoding adhesion proteins such as:

A

-cadF (Campylobacter adhesion to fibronectin)

33
Q

Flagellar genes also identified

A
34
Q

-internalized into epithelial cells following adhesion
-may replicate within the membrane-bound compartment
-then released by exocytosis from basolateral surface

A

C. jejuni (intestinal pathogen)

35
Q

Cytolethal distending toxin identified in:

A

-C. jejuni
-C. fetus

36
Q

Has particular tropism for bovine host

A

C. fetus subsp. venerealis

37
Q

Contains genes encoding the components of a_____

A

Type IV secretion system

38
Q

Has also heat stable endotoxin

A

Pathogenesis is uncertain

39
Q

Infertility

A

-Cattle
-caused by C. fetus subsp. venerealis

40
Q

Abortion

A

-Ewes
-caused by C. fetus subsp. fetus” or by “C. jejuni

41
Q

Bovine genital campylobacteriosis
-etiology
-transmission

A

-C. fetus subsp. venerealis
-coitus

42
Q

Ovine genital campylobacteriosis
-etiology
-transmission

A

-C. fetus subsp. fetus or (faeces of cattle and sheep)
-C. jejuni (faeces of wide range of birds and mammals)

-fecal-oral route

43
Q

-Intestinal campylobacteriosis in dogs
-Avian vibrionic hepatitis
-Intestinal campylobacteriosis in humans

A

-
-C. jejuni
-C. jejuni

44
Q

Helicobacter
-shape
-type of bacteria
-size
-requirement
-environment
-saccharolytic?
-oxidase
-catalase

A

-helical, S-shaped or curved, rods
-Gram-negative rods
-(3.0 x 0.5 to 0.9 um)
-enriched media; some grow on Skirrow’s agar
-microaerophilic
-non-saccharolytic
-positive (except *H. canis)
-positive

45
Q

Helicobacter found in

A

Gastric mucosa and others are found in the intestine of humans and animals including both domestic and wild animals and birds

46
Q

Characteristic of Helicobacter which colonize the gastric mucosa

A

A strong urease reaction

47
Q

H. pylori human pathogen associated with

A

-gastric ulcers
-gastric adenocarcinoma
-mucosa-associated lymphoid tissue (MALT) lymphoma

48
Q

H. pylori human pathogen associated with many disease morphology

A

Slightly curved

49
Q

Non-H. pylori helicobacters morphology

A

Long and spiral-shaped

50
Q

Helicobacter is associated with gastritis in

A

-pigs
-cats
-dogs

51
Q

-associated with sheep abortion
-noe thought to compromise several Helicobacter species

A

‘Flexispira rappini’

52
Q

Morphology of ‘Flexispira rappini’

A

-Distinctive
-spindle-shape
-gram negative bacteria
-with periplasmic fibres
-and bipolar tufts of sheathed flagella

53
Q

Catalase production postive

A

Except:
-C. mucosalis
-C. sputorum* biovar Sputorum

54
Q

Growth at 25 degree celcius

A

-C. fetus subsp. venerealis
-C. fetus subsp. fetus
-C. hyointestinalis

55
Q

Growth at 42 degrees celcius

A

Except:
-C. fetus subsp. venerealis
-C. fetus subsp. fetus

56
Q

Growth in 1% glycine

A

All except:
-C. fetus subsp. venerealis (some strains are glycine tolerant and are designated C. fetus subsp. venerealis biovar Intermedius

57
Q

Growth in 3.5% NaCl

A

Only:
-C. sputorum biovar Sputorum

58
Q

Positive for production of H2S (lead acetate method of detection)

A

All except:
-* C. fetus* subsp. venerealis

59
Q

Susceptibility to Nalidixic acid (30 ug discs)

A

Resistant except:
-C. fetus subsp. fetus: (V)
-C. jejuni subsp. jejuni: (S)
-C. coli: (S)

60
Q

Susceptibility to Cephalothin (30 ug discs)

A

Only resistant:
-C. jejuni subsp. jejuni
-C. lari
-C. coli

61
Q

Table 34.1
Figure 34.2
Figure 34.3

A

POSTMIDTERM:LHE BACTE (5 decks)

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