6. When does type 1 ostertagiosis occur?
- In lambs' first grazing season (july-september)
- After 1st grazing season (jan-may)
- Towards end of 1st grazing season (nov-dec)
7. When does type II ostertagiosis occur?
- After 1st grazing season (jan-may)
- In lambs' 1st grazing season (july-september)
- Towards end of 1st grazing season (nov-dec)
