Trichostrongyloidea 2 Cooperia, Nematodirus, Haemonchus Flashcards
Cooperia occur where and in what main species
small intestine
cattle
cooperia: what is the main species in south Australia?
Northern Australia?
SA: C. oncophora
NA: C. pectinata, C. punctata
Prepatent period of cooperia and type of lifecycle
15 days
direct life cycle
Where is L3 cooperia located within the host
L3 burrows into the mucosal glands
Where is L4 cooperia located within the host
L4 has anterior end in glands but body in lumen of SI
Where is the adult cooperia located in the host
lumen of SI
Does cooperia do hypobiosis
hypobiosis prominent
What is the pathogenesis of cooperia (3 points)
- nematodes brace themselves against villi
- cause mild villous atrophy, some erosion of epith
- burdens of 50000 or more cause anorexia and diarrhea
When will the host become infected with cooperia in souther Australia
pick up occurs during winter
Where is Nematodirus sp located and in what species
small intestine of sheep and cattle
What species of nematodirus infect sheep in the small intestine (3)
N. spathiger
N. filicollis
N. abnormalis
What species of nematodirus affects cattle and sheep but is not located in Australia
N. battus (most pathogenic)
what species of nematodirus infects cattle small intestine
N. helvetianus
What are three defining features of cooperia
- size: ~9mm
• small cephalic vesicle
• oesophageal region: transverse cuticular striations
• body: longitudinal cuticular ridges
• spicules: wing-like expansion in the middle region with ridges
• no gubernaculum! (male worms)
What are three defining features of Nematodirus
- size ~25 mm
- coiled
- cephalic vesicle
- long thin spicules
- female with spiked tail
- very large eggs**
