Nematodirus battus (2) Flashcards
1
Q
What are the hosts?
A
Lambs (sheep)
2
Q
Describe an adult
A
Large - more than 2.5 cm long
Small intestine
Female has spine on tip of tail
Similar in appearance to cotton
3
Q
Describe an egg
A
Very large - 130 micro m
2-8 distinctive large cells inside
Individually identified
4
Q
What is the site of infection?
A
Small intestine
5
Q
Describe the Pathogenesis
A
Adult sheep have immunity
Lambs contaminate pasture for following grazing season
6
Q
How do you diagnose?
A
Clinical signs during PPP
Egg counts are of little value
When eggs, EPG low (600-3000)
Grazing history
Necropsy
7
Q
What factors influence the disease?
A
Require a freeze and then warmth for L3 to emerge from egg
Large numbers emerge at same time
Normally in spring
8
Q
What is the common name?
A
Long neck bankrupt worm
Lamb-to-lamb disease
