Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Parasitology > Nematodes VII: Ascarids > Flashcards

Nematodes VII: Ascarids Flashcards

1
Q

What are the ascarids in poultry?

A

Ascaridia galli

Heterakis gallinarum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the DH of Ascaridia galli?

A

Birds in Order Galliformes

Ducks, other waterfowl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the PH of Ascardia galli?

A

Earthworm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the DH of Heterakis gallinarum?

A

Birds in Order Galliformes

Ducks, other waterfowl

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the PH of Heterakis gallinarum?

A

Earthworm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What are the signs of Heterakis gallinarum due to?

A

Histomonas meleagridis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is most pathology of Heterakis gallinarum due to?

A

Histomonas meleagridis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is Heterakis gallinarum/Histomonas meleagridis most important in?

A

Turkeys

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the pathogenesis of Heterakis gallinarum?

A

Pale circular lesions in the liver
Typhlitis (inflammation of cecum)
Vector of Histomonas meleagridis (protozoa)
Most pathogenic in turkeys

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the main way to control Ascaridia galli and Heterakis gallinarum?

A

Management

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Are any chickens resistant to Ascaridia galli or Heterakis gallinarum?

A

Older chickens are possibly resistant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the DH is Ascaris suum?

A

Swine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the PH of Ascaris suum?

A

Dung beetle

Earthworms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the infective stageof Ascaris suum?

A

L3 and the egg

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Where does Ascaris suum migrate?

A

Liver
Lungs
Small intestine

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the pathogenesis of Ascaris suum in the liver?

A

Cellular destruction
Interstitial hepatitis
Localized fibrotic areas; reaction to larvae; “milk spots”

17
Q

What is the pathogenesis of Ascaris suum in the lungs?

A

Hemorrhage, bronchitis, edema

Pneumonia in young pigs

18
Q

What is the pathogenesis of Ascaris suum in the small intestine?

A

Catarrhal enteritis
Adult worms interfere with nutrition
Obstruction or perforation

19
Q

What are clinical signs of Ascaris suum?

A

Coughing

Rapid shallow breathing called “thumps”

20
Q

What is the DH of Parascaris equorum?

A

Equids

21
Q

What is the PH of Parascaris equorum?

A

There is not one

22
Q

What are clinical signs of Parascaris equorum due to?

A

Different stages

23
Q

What is the peak prevalence of Parascaris equorum?

A

4 months of age, and it decreases at 6 months

24
Q

What are the DH of Toxascaris leonina?

A

Canids
Felids
Wild canids

25
Q

What is the PH of Toxascaris leonina?

A

Rodents

26
Q

What is distinctive about the Toxascaris leonina life cycle?

A

No somatic migration, but it still ends up in the small intestine

27
Q

What is the Toxascaris leonina pathogenesis?

A

Toxascariasis
Not highly pathogenesis because there is not somatic migration, so no mammary or transplacental transmission
This infection is very rarely reported in humans

28
Q

What are the transmission routes of Toxocara cati?

A 
DH ingests L3 in egg
---migration of larvae
DH ingests PH
---no migration
Transmammary
---infection only when queen is lactating
---NO TRANSPLACENTAL
29
Q

What is the pathogenesis of Toxocara cati?

A

Mechanical damage to SI
Interference with nutrition
Obstruction of SI

30
Q

What are the transmission routes of Toxocara canis?

A
  1. DH ingests L3 in egg
  2. PH ingests L3
  3. L3 ALD; re-activate
    - –Transmammary
    - –pups infests L3. L4, adults in SI
  4. L3 ALD; re-activate
    - –Transplacental
    - –L3 to stomach. L4, adults in SI
31
Q

What is the most important transmission route of Toxocara canis?

A

Transplacental

32
Q

What is Baylisascaris procyonis?

A

Ascarid of raccoons
Occasionally found in dogs
Midwest, NE West coast, emerging in SE

33
Q

What is the direct transmission of Baylisascaris procyonis?

A

Yound raccoon ingests egg with L2; hepatopulmonary migration

34
Q

What is the indirect transmission of Baylisascaris procyonis?

A

PH: small mammals, birds

Older raccoons ingest PH

35
Q

What are the accidental hosts of Baylisascaris procyonis?

A

Humans

36
Q

Why is Baylisascaris procyonis a concern?

A

Raccoon latrines
Children playing
Dog can acts as a DH
Can spread near people

37
Q

What are the 2 major forms of Toxocariasis that cause it to be a public health concern?

A 
Visceral toxocariasos (VT), also called visceral larva migrans (VLM)
Ocular toxocarisis (OT), also called ocular larva migrans (OLM)
38
Q

What is the pathology of the DH with Baylisascaris spp?

A

Usually no significant lesions

39
Q

What is the pathology of other hosts with Baylisascaris?

A

Mechanical damage to tissues; granulomas
Brain and spinal cord lesions
Lung damage from migration

Parasitology (27 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions