Anatomical location of main internal parasites in horses.

Know your worms

LiverAscarids/Large Roundworms

(Parascaris equorum),Large Strongyles/Bloodworms

(Strongylus equinus,Strongylus edentalus)

StomachBots (Gasterophilus spp),

Large MouthStomach Worms

(Habronema muscae),Hairworms

(Trichostrongylus axeï)

Suspensory ligamentNeck threadworms(Onchocerca cervicalis)

SkinSkin lesions (Habronema spp., Draschia spp., Onchcerca spp.),

Intestinal Threadworms(Strongyloides westeri)

EyesSkin lesions (Habronema spp.)

Nuchal ligamentNeck threadworms

(Onchocerca cervicalis)

LungsAscarids/Large Roundworms(Parascaris equorum),Lungworm (Dictyocaulus arnfi eldi)

RectumPinworms (Oxyuris equi),

Bots (Gasterophilus haemorrhoidalis)

Caecum ColonPinworms (Oxyuris equi),

Large Strongyles/Bloodworms (Strongylus spp.), Tapeworms (Anoplocephala perfoliata),Small Strongyles (Cyathastomum spp.)

Small IntestineAscarids/Roundworms

(Parascaris equorum),Intestinal Threadworms

(Strongyloides westeri),Tapeworms

(Anoplocephala magna)

Blood VesselsBloodworm larvae(Strongylus vulgaris),

Intestinal Threadworms(Strongyloides westeri)

Tapeworm(Anoplocephala

perfoliata)

Ascarids/LargeRoundworms

(Parascaris equorum)

Small Strongyles(Cyathastomum spp.)

Pinworms(Oxyuris equi)

Large Strongyles/Bloodworms

(Strongylus spp.)

Bots(Gastrophilus spp.)

Large Strongyles/Bloodworms

(Strongylus spp.)

Lungworms(Dictyocaulus arnfi eldi)