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Rotation > Sheep parasitology > Flashcards

Sheep parasitology Flashcards

1
Q

Haemonchus contortus- adults or lambs?

A

Both

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2
Q

what stage of the worm lifecycle is inside the host?

A

L3- L4

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3
Q

Which stage of the worm cycle is ingested by the sheep?

A

L3

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4
Q

Trichostrongylus- adults or lambs?

A

lambs only

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5
Q

Adult sheep have good immunity to Teladorsagia, trichostrongylus but not …

A

haemonchus contortus

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6
Q
A
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7
Q

Cx of trichonstrongylus spp in sheep (4)

A
  • diarrhoea
  • ill-thrift
  • sudden death!
  • weight loss
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8
Q

Which drench has the most resistance?

A

white

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9
Q

Which drenches have the least resistance?

A

purple and orange

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10
Q

Clinical signs of haemonchus contortus

A
  • anemia
  • bottle jaw
  • sudden death
  • exercise intolerance
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11
Q

Treatment of haemonchus

A
  • broad spec wormers ie Closantel
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12
Q
  • Clinical signs of nematodirus Battus
A
  • severe scours
  • death
  • stunting growth
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13
Q

Nematodirus only causes disease in ….

A

young sheep (adults are resistant)

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14
Q

Nematodirus is different from other worms, in that the infective stage is when the larva is in ….

A

the egg

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15
Q

Before Nematodirus eggs can hatch, the eggs have to undergo a period of …. followed by … temperatures

A

cold/ warmer

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16
Q

Does trichostrongyles require an intermediate host?

A

No

17
Q

What is the IH of the fluke?

A

snail

17
Q

liver fluke cycle lasts in total

A

18-20 weeks

17
Q

What part of the liver fluke cycle is ingested by the sheep?

A

the metacercaria

17
Q

3 clinical forms of liver fluke

A

acute
subacute
chronic

18
Q

most flukicides only kill…

A

adult flukes not immature flukes

18
Q

Psoroptes ovis lifecycle lasts how many days?

A

14days

19
Q

What is the lifecycle of psoroptes ovis

A
  • egg—> larva—> nymph—> adult
19
Q

what does epg stand for

A

eggs per gram

20
Q
A
20
Q
A
21
Q
A
21
Q
A
21
Q
A

Rotation (11 decks)

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