Haemonchus contortus

HAEMONCHUS CONTORTUS

Common name Stomach worm or Barber's pole worm or Wire worm of ruminants
Size Male : 1-2 cm; female : 1.8-3 cm
Host
Sheep, goats, cattle and buffaloes
Location
Abomasum
Head end
  • Small funnel shaped buccal capsule with a small dorsal lancet.
  • Cuticle transversely striated with longitudinal ridges (not prominent).
  • Pair of cervical papillae very near the anterior end.
Male tail end
  • The bursa has well developed lateral lobes supported by the long slender rays.
  • The dorsal lobe is asymmetrical and is supported by inverted 'Y' shaped dorsal ray.
  • Spicules are equal, short and end in knobs and are provided with barbs near the tip.
Female tail end
  • The vulva is covered by a cuticular flap-vulval flap.
  • In some worms it is large and tongue like (linguiform type).
  • In others, the cuticular flap is reduced to a small knob (Knob type).

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Last modified: Tuesday, 19 June 2012, 10:12 AM