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Microbiology > 2) Parasites: Nematodes > Flashcards

2) Parasites: Nematodes Flashcards

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Biology 101 flashcards
1
Q

Roundworms are class what?

A

Class Nematoda

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2
Q

Helminth means

A

worm

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3
Q

Do Helminths live intracellularly or extracellularly?

A

extracellularly in GI tract and organs

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4
Q

Ingestion of nutrients can be?

A

Passive or active

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5
Q

nutrients are stored as?

A

glycogen

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6
Q

sexual or asexual reproduction

A

sexual

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7
Q

what time of sex?

A

males, females, and some hermaphrodites

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8
Q

Oviparous

A

they are egg-laying

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9
Q

Where do helminths multiply?

A

they do not multiply in the host. Must leave

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10
Q

is there more or less infection from environmental exposure

A

more infection with environmental exposure

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11
Q

Nematodes can be free-living or parasitic true/false

A

true

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12
Q

Nematode shape

A

elongate/cylindrical

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13
Q

what kind of mouth present in nematodes?

A

Alimentary canal present (they have teeth)

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14
Q

do sexes separate or stay to together?

A

typically separate

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15
Q

characteristics for identification

A 
bursa (males can be with or without)
vulva
mouth
esophagus
size
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16
Q

direct lifecycle: infective larva is L what?

A

L3

17
Q

Direct Lifcycle: Infective egg is L what?

A

L2

18
Q

Indirect lifecycle: L1 is infective to:

A

intermediate host

19
Q

Indirect lifecycle: L3 is infective to:

A

final host

20
Q

Means of survival for Nematode

A 
Periparturient rise
eggs with larva
paretic hosts
transmammary
transplacenta
21
Q

Periparturient rise definition

A

animals with large poop protect parasite

animals with small poop do not protect parasite

22
Q

how is the immune system avoided

A

arrested development

23
Q

Bad weather

A

hypobiosis (arrested development)

24
Q

what is the definitive host?

A

Dog, sheep

25
Q

Paratenic host?

A

mouse, mosquito in dog

26
Q

Partenic host with a cat for definitive host? (indirect lifecycle)

A

the bird paratenic host

snail intermediate host

27
Q

Nematode to know?

A

Ancylostoma caninum

28
Q

Ancylostoma caninium

A
  • L3 = infective stage
  • Prepaturient rise
  • Direct Lifecycle
  • arrested development
  • lung migration
29
Q

Ancylostoma caninium: Five modes of infection:

A
  • Percutaneous or oral penetration
  • Per os
  • Paratenic hosts
  • Transplacental: rare
  • Transmammary: important
30
Q

Ancylostoma caninum : Lifecycle:

A

Direct

31
Q

Ancylostoma caninum characteristics

A

small 1-2 cm, hook appearance, small intestine, attach to intestinal villi with large mouth, limited immunity, zoonotic, most severe in young animals

32
Q

Ancylostoma caninum: large mouth

A

buccal cavity

33
Q

Ancylostoma caninium causes

A
  • hemorrhaging

- Anemia

34
Q

Ancylostoma caninum egg shape

A

oval, thin shelled 60 x 40 um

35
Q

Perpartuient rise in Ancylostoma caninum

A

2-3 weeks

36
Q

Ancylostoma caninum: Lifecycle

A

Direct dog poops, egg passes in feces, larvae hatch develop and is ingested by dog. can also get transmamary/transplacentally

Microbiology (10 decks)

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