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

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

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

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

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

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

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

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