1. External & Internal Parasites
Jake Everhart
May 16, 2001
Modified by Georgia Agricultural Education Curriculum Office
June 2002

2. Symptoms of Parasitic Infestation
Parasites to the stomach and intestines cause:
Anemia
Scouring
Depression
Death

3. Description of Parasitic Infestation
Roundworms:
Found in the digestive system
Most important parasites from an economic standpoint
Mostly in stomach and intestines

4. Stomach Worm Several species of stomach worm
Twisted stomach worms and brown stomach worms are the most important.
Found in all classes of livestock
Most common in cattle, sheep and horses.
Penetrates the stomach lining
Causes severe damage

5. Calf Scours Diarrhea Two main forms Hypersecretion Malabsorption
Result of Diarrhea
Dehydration
Dryed out mouth

6. Strongyles Several species Attack all species Greater affect on young
Blood sucking parasites that attach to the lining of the intestines

7. Ascarids Parasites of cattle, sheep, horses and hogs
Affects young mostly
The larvae burrow into the wall of the intestines and migrate through the liver, heart, and finally the lungs

8. Description of external parasites
Mites and mange
Mites are a live parasite
Mange is a live fungus