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38 Cards in this Set
- Front
- Back
Monogenea |
- second class of major flukes - ECTOparasites on aquatic vertebrates - DIRECT LIFE CYCLES - adult produce egg - hermaphrodites - prophator: anterior - opisthator: posterior |
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Gyrodactylus adult - host: body surface of freshwater fish - undergo serial plyembryony (asexual) for rapid increase in population - serious pest and cause mortality - fish surrounded by thin moving halo |
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Gyrodactylus adult |
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Octomacrum adult - gill flukes of FRESHWATER FISH - common in alberta -no real serious disease |
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Octomarcrum adult |
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Rjonchocotyle adult - live on CARTILAGENOUS FISH - wide distribution |
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Rajonchocotyle adult |
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Microcotyle adult - infect variety of MARINE and FRESHWATER FISH - opisthaptor have large number of tiny clamps |
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Microcotyle adult |
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Acanthocephala |
- thorny headed worms - SEPARATE SEXES - pseudocoelomate: internal organs float free within coelom without peritoneum - no mouth or digestive tract - nutrients absorbed - males seal vagina after copulation with cement |
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Echinorhynchus adult - freshwater and marine fish - size dimorphism: MALE SMALLER on the right side |
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Echinorhynchus male |
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Echinorhynchus adult male - have cement glands - lemniscus is the brain |
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Echinorhynchus adult female |
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Polymorphus adult - female on the right - BIRDS AND MAMMALS - behavioural alteration in CRUSTACEAN intermediate |
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Nematodes |
- round worms - pseudocoelomate, covered in thick cuticle - COMPLETE DIGESTIVE SYSTEM - most have different sex organs - most produce an egg - most have DIRECT LIFE CYCLE - pass through FOUR LARVAL STAGES before adult |
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Trichinella - small (2-3mm long) - infect variety of mammals - each host is first the definitive host - adults are INTRA-MULTI-CELLULAR - has stichocytes - secretory cells surrounding esophagus |
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Trichinella muscle larva |
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Trichinella muscle larva |
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Trichinella adult male |
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Trichinella adult male |
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Trichinella adult female - female is thinner than the male |
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Trichinella adult female |
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Trichuris - WHIPWORMS - anterior burrows into INTESTINAL MUCOSA - cause serious pathology in mammal host - gastrointestinal problems (abdominal pain, diarrhea, rectal prolapse) and growth retardation |
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Trichuris eggs |
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Trichuris eggs - left unembryonated -right embryonated |
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Trichuris adult female |
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Trichuris adult female |
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Trichuris adult male |
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Trichuris adult male |
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Heligmosomoides |
- RODENTS - used as a model for studies in behaviour, immunology, physiology, pathology and ecology - DIRECT LIFE CYCLE - coiled body shape of adult |
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Heligmosomoides egg |
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Heligmosomoides L3 |
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Heligmosomoides adults mating |
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Heligmosomoides male |
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Heligmosomoides female |
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Hookworms |
- ancylostoma and necator - well developed cutting plates in buccal capsule - serious to humans and mammals - ANEMIA AND DEATH - adults 10mm long - infection via skin penetration |
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Hookworm buccal capsule |