Category:Strongyloidea

General Appearance

Strongylus - Joaquim Castellà Veterinary Parasitology Universitat Autònoma de Barcelona

Strongyloid nematodes share a a number of morphological features. They are bursate, meaning that the males have a copulatory bursa.

• Bursate
• Large buccal capsule
• Relatively short (typically 1-5cm) but stout
• Heads often have characteristic features - teeth or cutting plates

General Life-Cycle

• Like that of the trichostrongyloids (eggs are also 'typical strongyle eggs'), but:
  • L3 → L4 → adult (typically occurs in the large intestine)
  • Larvae penetrate the mucosal wall and elicit nodule formation
  • Larvae of some species migrate around the body
  • Prepatent period varies between species from 3 weeks to over 6 months

Strongylus vulgaris

Peritonitis in sheep by penetration of intestines by larvae of Oesophagostomum columbianum

Strongylus edentatus and Strongylus equinus migrate through Peritoneal Cavity - Parasitic Pathology

Stephanuris dentatus causes peritonitis in pigs Peritoneal Cavity - Parasitic Pathology and may cause cysts in the pancreas

Syngamus laryngeus