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Parasit > Superfamily Ascaridoidea > Flashcards

Superfamily Ascaridoidea Flashcards

1
Q

List the ascaridoideas. What kind of worm are they?

A

Roundworms!!!

  1. Toxocara canis
  2. Toxocara cati
  3. Toxocara leonina
  4. Baylisascaris procyonis
  5. Parascaris equorum
  6. Ascaris suum
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2
Q

What is the predilection site of ascarids? What is the common CS?

A

Small intestine, worm load causes obstruction and pot belly

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3
Q

What age group do ascarids infect the most?

A

Young!! age related immunity

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4
Q

What are the modes of transmission in toxocara canis?

A

per os, TRANSPLACENTAL, paratenic host

** arrested larvae in mom migrates to the placenta and affects newborn pups

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5
Q

What does the toxocara canis egg look like?

A

Dark brown, avg size, thickkk shell

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6
Q

What are the CS of toxocara canis?

A

pot belly, obstruction of SI, pneumonia from lung migration

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7
Q

What is the treatment plan for toxocara canis?

A

Treat migrating L4, IA in mom when pregnant

treat puppies (before eggs are seen) and mom @ 2,4 ,6, 8 weeks of age

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8
Q

Is toxocara canis zoonotic?

A

YES!! causes visceral larval migrans and ocular larval mirgans in humans

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9
Q

What is the PPP of toxocara canis? When will you see CS?

A

3-5 weeks . you will see CS before PPP

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10
Q

What does a toxocaris leonita egg look like? how does it differ from toxocara canis?

A

oval, thick shell

tox. canis has a round egg and it DARK BROWN

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11
Q

Which parasite is a lazy larvae? What does this mean?

A

Toxascaris leonita- no lung migration!

this means its not zoonotic

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12
Q

What is the PPP os toxascaris leonita?

A

11 weeks.

cats and dogs < 4 months not affected

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13
Q

What is the predilection site of toxascaris leonita?

A

adults in SI , no lung migration

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14
Q

What is the lifecycle of Toxascaris leonita?

A

direct with infective L3

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15
Q

What is the lifecycle of Toxascara canis and cati?

A

Direct, infective L3 inside the egg

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16
Q

Is baylisascaris procyonis zoonotic?

A

YES extremely!! main concern for humans.

hepatic tracheal migration, visceral larval migrans, ocular larval migrans,

LARVA can migrate to the BRAIN!!!

17
Q

What are the hosts of baylisascaris procyonis?

A

Final host: raccoons

Accidental host: DOG

zoonotic to humans

18
Q

What is the treatment plan for parascaris equorum?

A

prophylactically treat young foals before PPP!!

treat slowly to kill worms

19
Q

What are the CS of parascaris equorum?

A

hepatic tracheal migration- passing bronchitis and pneumonia in young foals, unthrifty

20
Q

What is the lifecycle of parascaris equorum?

A

Direct, infective L3 inside the egg

21
Q

What is the PPP of parascaris equorum?

A

3 months

22
Q

What is the paratenic host of ascaris suum? What is the final host?

A

PH: Earthworm, dung beetles

Final host: PIGS!!

23
Q

Is ascaris suum zoonotic?

A

YES!! can cause allergic rxn in humans

24
Q

What does an ascaris suum egg look like?

A

Round, thick shell, mammilated (curly bumpy outer shell)

25
Q

What is the pathogenesis seen in ascaris suum?

A

MILK SPOTS on condemned liver !!!

26
Q

What is the treatment plan of ascaris suum?

A

Treat piglets at weaning

wash moms before farrowing

27
Q

Who is most affected by ascaris suum?

A

INDOOR AND OUTDOOR baby piglets! (weanlings) can get CS of transient pneumonia < 4 months of age

28
Q

What are the CS of ascaris suum?

A

transient pneumonia in pigs < 4 months of age, hepatic larval migration, unthrifty

milk spots on condemned liver

29
Q

What is the predilection site of ascaris suum?

A

HUGEEEE adults in SI

30
Q

What is the lifecycle of ascaris suum?

A

Direct with infective L3 inside the egg

31
Q

What is the street name of heterakis?

A

poultry cecal worm

32
Q

What is the final host of ascaridia? What age is most affected?

A

Birds, chickens

specifically young birds

33
Q

What is the final host of heterakis?

A

Birds

34
Q

What is the largest nematode in poultry?

A

Ascaridia spp. - the avian roundworm

35
Q

What is the clinical importance of heterakis?

A

heterakis itself is not a problem but the heterakis egg contains a protozoa know as HISTOMONAS MELEAGRIDIS which causes BLACKHEADS in TURKEYS causing 100% death rate

36
Q

What parasite causes blackheads in turkeys?

A

the protozoa histomonas meleagridis that is found in the egg of heterakis (poultry cecal worm)

37
Q

What is the predilection site of heterakis?

A

small worms in the LARGE INTESTINE

38
Q

What is the predilection site of acaridia?

A

LARGE adult worms in the SMALL intestine

Parasit (2 decks)

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