Other Gastrointestinal Parasites

Question 1

Other then telodorsagia circumcinta which other parasite is found in the abomasum of sheep?

Answer 1

Trichostronylus axei- only trichostrongylus found in abomasum

Question 2

What parasites are found in the small intestine of a sheep?

Answer 2

Cooper spp, trichostonglyus spp

Question 3

How can a trichostrongylus spp be identified?

Answer 3

Very small worms (4-7mm), found in abomasum, adult worm has a notch (excretory pore), distinct at head of worm (may need reorientating)

Question 4

How can a trichostrongylus male/female be distinguished?

Answer 4

Males have bursa with spicules- short, stout, unequal and dissimilar

Question 5

How can a cooperia spp worm be identified?

Answer 5

‘Watch spring’ worm- coils

Cephalic vesicle- transparent extension of cuticle

Question 6

What clinical signs does cooperia spp cause?

Answer 6

Can affect weight gain, heavy infection leads to catarrhal enteritis, villous atrophy, oedema of intestinal mucosa

Question 7

What life cycle is trichostrongylus spp similar to?

Answer 7

Telodorsagia circumcinta

Question 8

What is the pre-patent period of trichostronglyus spp?

Answer 8

3 weeks

Question 9

Can trichostrongylus spp hypobiose?

Answer 9

Yes- L3 on pasture over winter

Question 10

What are the clinical signs of trichostrongylus spp?

Answer 10

Haemorrage, oedema, diarrhoea, black scour, weight loss, poor growth