horse worms
Worm Size (CM) Location Anterior Posterior
M F
Trichostrongylus

<0.9

Stomach Excretory notch Bursa
Strongylus equinus 2.6-3.5 3.8-4.7 LI

Leaf crowns
Globular
3 pointy teeth

♂ Bursa
Strongylus edentatus 2.3-2.8 3.4-4.4 LI

Leaf crowns
Globular
No teeth

♂ Bursa
Strongylus vulgaris 1.4-1.6 2-2.4 LI

Leaf crowns
Globular
2 rounded teeth

♂ Bursa
Tridontophorus

0.9-2.5

LI

Leaf crowns
Sub-globular
4 pointy teeth

♂ Bursa
Cyathostome 0.8-1.5 0.8-2 LI

Cylindrical
Well developed
Leaf crowns

♂ Bursa
Strongyloides westeri - <0.9 Stomach

Very large pharynx

Habronema 1-2.5 Stomach

'U' buccal capsule

Spiral twist
Caudal alae
Draschia 1-1.5 Stomcah

'Y' buccal capsule

Spiral twist
Caudal alae
Parascaris equorum >10 >10 SI

3 Lips

Oxyuris equi - 5-10 LI

Bulb oesophagus

Long tapering tail
Anoplocephala perfoliata 3-8 x 1.2 wide Ileocaecal junction

Cestode
Lappets

Anoplocephala magna < 80 x 1.2 wide SI

Cestode
No lappets

Anoplocephaloides mammillana 6-50 x 0.6 wide SI

Cestode