Small ruminant PGE

Question 1

What are the primary pathogens of the abomasum?

Answer 1

Ostertagia circumcinctaand Haemonchus contortus

Question 2

What are the primary pathogens of the small intestines?

Answer 2

Trichostrongylus worms and Nematodirus battus

Question 3

Describe Type 1 ostertagiosis

Answer 3

Lambs during first grazing season. Diarrhoea, weight loss, reduced appetite.

Question 4

Describe type 2 ostertagiosis

Answer 4

Lambs after first grazing season. Intermittent diarrhoea.

Question 5

Why is there an increase in ostertagia faecal egg count in lambing time?

Answer 5

The ewes have a dip in immunity due to lambing.

Question 6

When does trichostrongylosis occur and what symptom is it mainly associated with?

Answer 6

At the end of first lambing season. Black scours

Question 7

What worm causes clinical nematodirosis

Answer 7

N. Battus

Question 8

What age are lambs most likely to be struck down by Nematodirosis?

Answer 8

6-10 weeks

Question 9

How long can N.Battus eggs persist in pasture for?

Answer 9

up to 2 years

Question 10

Where can Haemonchus contortus be found?

Answer 10

abomasum

Question 11

What is the pathogenesis of Haemonchus contortus?

Answer 11

Block sucking so depletes Hb and Fe.