Equine Internal Parasites

Question 1

Internal parasites can

Answer 1

• lower the horses resistance to infection
• rob the horse of valuable nutrients
• cause permanent damage to internal organs

Question 2

Large Strongyle AKA

Answer 2

Bloodworms, redworms, Strongylus vularis

Question 3

Larval Large Strongyles

Answer 3

penetrate the linging of the bowel and migrate along the blood vessels that supply the intestines

Question 4

Large Strongyles symptoms

Answer 4

• unthriftiness
• weight loss
• poor growth in young horses
• anemia
• colic
• inflammation and blood clots that can lead to severe colic in the intestine

Question 5

Large Strongyles are controlled by

Answer 5

using macrocyclic lactones and related dewormers

Question 6

Small Strongyles AKA

Answer 6

Cyathostomin parasites

Question 7

Small Strongyles larvae

Answer 7

Burrow into the linging of the intestines where they remain encysted for several months in the large intestine
-dewormers do not affect the larvae at this time

Question 8

Small Strogyles symptoms

Answer 8

-severe damage to the lining of the intestines and severe diarrhea
-colic
weight loss
poor coat condition
-lethargy

Question 9

Small Strongyles controlled

Answer 9

• Dewormers
• Moxidectin and fenbendazole for encysted
• (resistant) benzimidazole and pyrantel

Question 10

Ascarids AKA

Answer 10

Round worms

Question 11

Ascarids and foals

Answer 11

• large problem in young horses
• coughing
• poor body condition
• rough coat
• pot belly and colic

Question 12

Tapeworms AKA

Answer 12

Anoplocephala perfoliata

Question 13

tapeworms generally

Answer 13

• very common and tolerated well
• cause colic
• deworm 1-2 times a year

Question 14

tapeworms are characteristically

Answer 14

D-shaped as eggs