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Parasitology > Lecture 24: Roundworm disease I > Flashcards

Lecture 24: Roundworm disease I Flashcards

1
Q

What is the epidermis of nematodes covered by

A

Cuticle

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2
Q

Nematodes have a ___ with a separate mouth and anus

A

Complete digestive tract

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3
Q

What is the normal life cycle of nematodes

A
  1. 4 juvenile stages (L1-L4)
  2. L1-3 occur in intermediate host
  3. L3-L4 in definitive host
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4
Q

What is the infective stage for nematodes

A

L3

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5
Q

What does monoxenous mean

A

Acquired via ingestion of infective eggs or larvae

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6
Q

What does heteroxenous mean

A

Ingestion of infected intermediate or paratenic host

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7
Q

What species does A. Suum infect and where

A

Swine and SI- cause liver and lung damage

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8
Q

What species does Parascaris equorum infect

A

Horses

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9
Q

What life cycle do ascaridids have

A

Direct life cycle

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10
Q

How are ascaridids spread

A

Fecal oral transmission

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11
Q

Ascaridids undergo what type of migration in DH

A

Hepato-tracheal migration

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12
Q

Describe hepato-tracheal migration

A

liver—> lungs—> respiratory tree—> pharynx—> SI

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13
Q

What symptoms are present in young pigs with A. Suum infection

A

Respiratory signs (can be fatal), diarrhea, weight loss

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14
Q

What symptoms are present in foals with P. Equorum

A

Respiratory signs, weight loss, constipation, colic, diarrhea

Can be fatal

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15
Q

What diagnostic tool can be used to dx A. Suum or P. Equorum

A

Baermann apparatus

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16
Q

Following image is of pig lungs and liver. What parasite caused this

A

A. Suum

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17
Q

What species does T. Canis infect

A

Dogs

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18
Q

T. Canis is common in what dogs (age)

A

Puppies

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19
Q

How does T. Canis spread to puppies

A

Transplacental (usual mode), transmammary

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20
Q

What species does T. Cati infect

A

Cats

21
Q

What age group is T. Cati common in

A

Kittens

22
Q

How do kittens get T. Cati

A

ingestion of infective eggs
Can be transmammary if queen is infected late in pregnancy

23
Q

T. Cati can only spread to kittens transmammary under what circumstances

A

Queen is infected late in pregnancy

24
Q

What species does T. Leonina infect

A

Dogs and cats

25
Q

Where is body do toxocara species infect

A

SI

26
Q

How does dog or cat become infected with T. Leonina

A

Ingestive of infected eggs or paratenic hosts (rodents)

27
Q

What symptoms are seen in dog with T. Canis

A

Respiratory signs, poor growth, distended abdomen, vomiting diarrhea, pale MM, intestinal hemorrhage, peritonitis

28
Q

Can T. Canis be fatal

A

Yes in puppies

29
Q

What signs are seen in kittens with T. Cati

A

Distended abdomen, diarrhea, ill thrift

30
Q

What signs are seen in adult cats with T. Cati

A

Enteritis with vomiting

31
Q

Adult cat presented with vomiting, these worms were found in vomit. What parasite is this

A

T. Cati

32
Q

What zoonotic risk does toxocara species pose

A

Visceral larva migrans, ocular larva migrans, neurological larva migrans

33
Q

Puppy presented with respiratory signs, diarrhea, distended abdomen, vomiting. The following egg was found in fecal sample. What parasite is this

A

T. Canis

34
Q

What species does Ascaridia Gali infect and where

A

SI of Chickens, turkey, geese and wild birds

35
Q

What is the most common roundworm of domestic poultry

A

A. Galli

36
Q

Where are larvae of A. Galli located

A

Mucosa of SI

37
Q

Where are adults of A. Galli located

A

Lumen

38
Q

Chicken presents with decreased appetite, poor growth, drooping wings, pale combs and wattles, anemia, and diarrhea. The following fecal sample was obtained what is the parasite

A

A. Galli

39
Q

What is the tx for A. Galli

A

Fenbendazole

40
Q

What species does Heterakis gallinarum infect and where

A

Cecum of chickens, turkeys and other Galliform birds

41
Q

What is heterakis gallinarum the vector for

A

Histomonas meleagridis

42
Q

What species does oxyuris equi parasitize and where

A

Descending small colon, large colon and cecum of equids

43
Q

Where are oxyuris equid eggs typically found

A

Perianal skin

44
Q

Where are larvae of O. Equi located

A

Mucosal crypts of colon and cecum

45
Q

Where are adults of O. Equi located

A

Lumen of cecum and colon

46
Q

How can you Id O. Equi

A

Cellophane tape test or Perianal region

47
Q

What is used to tx O. Equi

A

Benzimidazoles

48
Q

Horse presents with Perianal itching, anorexia, restlessness, and nervousness. You perform cellophane tape test and find these eggs. What parasite is this

A

O. Equi

Parasitology (28 decks)

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