EQUINE MEDICINEEndoparasites

Endoparasites• Internal parasites

• Protozoa• Roundworms• Flatworms• Clinical signs

• Weight loss• Poor hair coat• Weakness• Colic

Endoparasites

• Life Cycle• Host• Parasite

• Protozoa• Nematodes• Cestodes• Trematodes

Cyathostomes

• Small Strongyles• Hibernate in intestinal wall

• Severe diarrhea• Weight loss• Mild colic

Strongylus vulgaris• Large Strongyles• Large Redworms

• Vessel migration• Colic• Unthriftiness• Diarrhea

Parascaris equorum• Ascarids

• Young animals• Stunted growth• Unthriftiness• Lung damage• Diarrhea• Colic

Strongyloides westeri

• Threadworm• Female is parasitic• Lung migration• Mammary glands

• Ingested by foal

Anoplocephala magna• Tapeworms

• Cecum• Colic/Off feed• Diarrhea/Dehydration• Depression/Lying

down

Gasterophilus intestinalis• Bots

• Eggs on legs• Larva attached to

stomach wall • 10 months

• Ill thrift• Weight loss• Colic

Dictyocaulus arnfieldi• Lungworms

• Donkeys-lungs-adults

• Horses-lungs-adults

• eggs coughed up and swallowed

• Clinical signs• Coughing• Nasal discharge• High respiratory

rate

Habronema species

• Stomach worms• Gastric• Cutaneous

• Summer sores• Clinical signs

• Itching• Open sores• Resolve in

winter

Oxyuris equi• Pinworms

• Adults in cecum, colon, rectum

• Clinical signs• Restless• Off feed• Loss of condition

Equine Protozoal MyeloencephalitisSarcocystis neurona

• EPM• 2 intermediate hosts

• Opossum• Birds, cats

• Clinical signs• Stumbling• Muscle wasting• Mild lameness

Onchocerca cervicalis• Onchocerca

• Intermediate host• Clinical signs

• Masses under skin• Lameness• Edema• Eye problems

Thelazia lacrymalis• Eye Worms

• Intermediate host• Face fly

• Clinical signs• Mild irritation• Possible blindness

Prevention and Control• Sanitation• Feed• Water• Physical removal• Deworming plan

Anthelmintics• Remove adults• Break life cycle