Anatomical location of main internal parasites in horses.

Nuchal ligament

Neck threadworms (Onchocerca cervicalis)

Stomach

Bots
(Gasterophilus spp),
Large Mouth Stomach Worms
(Habronema muscae)
, Hairworms
(Trichostrongylus axeï)

Watch Video of Bots

Blood vessels

Bloodworm larvae (Strongylus vulgaris),
Intestinal Threadworms (Strongyloides westeri)

Watch Video of Strongyles

Rectum

Pinworms (Oxyuris equi),
Bots (Gasterophilus haemorrhoidalis)

Watch Video of Pinworms Watch Video of Bots

Caecum Colon

Pinworms (Oxyuris equi),
Large Strongyles/Bloodworms (Strongylus spp.),
Tapeworms (Anoplocephala perfoliata),
Small Strongyles (Cyathostomum spp.)

Watch Video of Strongyles Watch Video of Tapeworms 1 Watch Video of Tapeworms 2 Watch Video of Tapeworms 3

Liver

Ascarids/Large Roundworms (Parascaris equorum),
Large Strongyles/Bloodworms (Strongylus equinus, Strongylus edentalus)

Watch Video of Ascarids Watch Video of Strongyles

Suspensory ligament

Neck threadworms (Onchocerca cervicalis)

Small intestines

Ascarids/Roundworms (Parascaris equorum),
Intestinal Threadworms (Strongyloides westeri), Tapeworms (Anoplocephala magna)

Watch Video of Strongyles Watch Video of Tapeworms 1 Watch Video of Tapeworms 2 Watch Video of Tapeworms 3

Lungs

Ascarids/Large Roundworms (Parascaris equorum),
Lungworm (Dictyocaulus arnfieldi)

Watch Video of Ascarids

Skin

Skin lesions
(Habronema spp., Draschia spp., Onchcerca spp.),
Intestinal Threadworms

Eyes

Skin lesions (Habronema spp.)

Click on the images to zoom in

Tapeworm (Anoplocephala perfoliata)

Ascarids/Large Roundworms (Parascaris equorum)

Small Strongyles (Cyathostomum spp.)

Pinworms (Oxyuris equi)

Large Strongyles/ Bloodworms (Strongylus spp.)

Bots (Gastrophilus spp.)

Large Strongyles/ Bloodworms (Strongylus spp.)

Lungworms (Dictyocaulus arnfieldi)

Ascarids (Lung Damage)

Ascarids (Liver Damage)