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Nematodes > Ascarids > Flashcards

Ascarids Flashcards

1
Q

Nematoda

A

roundworm

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2
Q

Infective stage for ascarids

A

L3

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3
Q

Ascarids- bursate or non bursate?

A

non- bursate

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4
Q

All ascarids on anterior end?

A

3 lips

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5
Q

Ascaris Suum

A

pig roundworm

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6
Q

Ascaris Suum- host?

A

pigs

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7
Q

Ascaris Suum- site of infection?

A

small intestine

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8
Q

Ascaris Suum- paratenic hosts

A

earthworms and dung beetles

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9
Q

Ascaris Suum- transplacental or transmammary transmission?

A

Neither

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10
Q

Ascaris Suum- PPP

A

6-8 weeks

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11
Q

Ascaris Suum- pathogenesis due to migrating juveniles?

A

“milk spots” in liver, respiratory distress, focal hemorrhages

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12
Q

Ascaris Suum- pathogenesis due to adults

A

poor growth and performance, diarrhea

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13
Q

Identify

A

Ascaris suum

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14
Q

Parascaris equorum

A

horse roundworm

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15
Q

Parascaris equorum- host?

A

equids

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16
Q

Parascaris equorum site of infection

A

small intestine

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17
Q

Parascaris equorum Transplacental or transmammary migration?

A

Only transmammary

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18
Q

Parascaris equorum PPP

A

10 weeks

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19
Q

Parascaris equorum Pathogenesis of migrating juveniles

A

respiratory distress and nasal discharge

20
Q

Parascaris equorum pathogenesis due to adult worms

A

moderate enteritis, colic, subnormal growth, dull hair coat

21
Q

Identify

A

Parascaris equorum

22
Q

Toxocara canis

A

dog roundworm

23
Q

Toxocara canis site of infection

A

adults in small intestines, juveniles migrate extensively

24
Q

Toxocara Canis-Transplacental or transmammary transmission?

A

transplacental transmission

25
Q

Toxocara canis- migrating juveniles

A

respiratory disease, 2-3 old day pups affected frequently

26
Q

Toxocara canis- adult worms in small intesitnes cause

A

nursing and weaned pups have pot bellies and tender bloated abdomens

27
Q

puppies spontaneously purge intestinal infections as they mature and develop immunity to

A

Toxocara canis

28
Q

identify

A

Toxocara canis egg

29
Q

identify

A

Toxocara canis adult

30
Q

feline roundworm

A

Toxocara Cati

31
Q

What species have age related immunity to what pasrasite?

A

Toxocara Canis only not Toxocara cati

32
Q

Toxocara cati-Transmammary or transplacental infection

A

transmammary

33
Q

identify

A

Toxocara cati

34
Q

identify

A

Toxocara cati adult

notice cervical alae

35
Q

Toxocara cati PPP

A

8 weeks

36
Q

How to get infected with Toxocara cati

A

Ingestion of Paratenic host (mouse) is important

37
Q

Host of Toxascaris leonina

A

dogs, cats, foxes and otehr wild carnivores

38
Q

Is there transplacental or transmammary transmission for Toxascaris leonina?

A

No

39
Q

Toxascaris leonina PPP

A

10 weeks

40
Q
A

Toxascaris Leonina

41
Q

Toxocara Vitulorum host

A

cattle

42
Q

identify

A

Toxocara vitulorum

43
Q

Bayliascaris procyonis hosts

A
  • Raccoon
  • can also infect dogs
  • 150+ species of birds and mammals
  • Wildlife; carnivores and omnivore
44
Q

identify

A

Baylisascaris procyonis

76 by 60 µm

45
Q

B procyonis vs T canis

A

B procyonis is smaller, darker and has finer pitting on the surface

46
Q

Ascarids - Public Health Significance

A

•Neurologic disease (Baylisascaris)

  • CNS migration
47
Q

Ascarid infecting humans

A

Enterobius vermicularis

Nematodes (5 decks)

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