I Flashcards
What is Veterinary Helminthology?
Veterinary Helminthology is the study of worms affecting animals
the word helminth was derived from the greek word “helmins” or “helminthos” which means?
vermin or a worm
Phyla of veterinary importance;
Platyhelminthes (flatworms)
Nemathelminthes (roundworms)
Acanthocephala (thornyheaded worms)
flat worms
platyhelminthes
round worms
Nemathelminthes
thornyheaded worms
Acanthocephala
Flukes
Trematoda
Tapeworms
Cestoda
monozoic (single body); present alimentary canal; parasitic
Trematoda (Flukes)
usually polyzoic (multiple bodies), segmented body (strobila) from few to thousand segments (proglottids); absent alimentary canal; parasitic
Cestoda (Tapeworms)
parasites in the skin and gill of fish, amphibians, and reptiles; with direct life cycle
Monogenea
of veterinary importance; parasites of domestic animals; requires an intermediate host
Digenea
parasites of fish, turtles, snails, and crabs; and with direct life cycle
Aspidogastrea
General Characteristics of Class Trematoda
• Body dorsoventrally flat
• Cuticle may be smooth or tiny
• Organs are embedded in the parenchyma
• Suckers for attachment are present
• Present Alimentary canal
• Life cycle may be direct or indirect
• Hermaphroditic except SCHISTOSOMES
Digestive System of Trematodes
• Oral opening
• Pharynx
• Esophagus
• Pair of intestinal ceca
