Lecture 1 Flashcards
(22 cards)
What is helminthology
the study of helminthes or “worms”
name the 4 Phylums of Helminthology and the common name for each
Playthelminthes- “flatworms” aka- flukes and tapeworms
Nematoda- “Roundworms”
Namatomorpha- “horse-hair worms”
Acanthocephala- “thorny-headed worms”
What are the three classes of phylum Platyhelminthes
Trematoda- Flukes
Eucestoda- true tapeworms
Cotyloda- pseudotapeworms
What are the two subclasses of Class Trematoda
Subclass Digenea & Subclass Monogenea
A subclass of trematodes that are typically ectoparasites and associated with water; infesting the skin/gills of fish, amphibians, and reptiles.
Monogenetic trematodes
Monogenetic trematodes commonly occur in domesticated animals- true or false?
False- None of the monogenetic trematodes occure in domestic animals.
a subclass of trematodes that are endoparasitic of domestic and wild animals and humans; that have more than one intermediate host
Digenetic trematodes
Fill in the blank:
The first intermediate hose for any digenetic fluke is usually a ______
Snail
What are the 7 morphological features of FLUKES
- Dorsoventrally flattened (may be long and narrow or leaf-shaped)
- have a tegument (outer-skin that’s covered in tiny spines or smooth)
- two organs of attachment (oral sucker and acetabulum)
- have GI system
- have and excretory system
- have a nervous system
- complex reproductive system- hermaphroditic
What are the only digenetic flukes that are not hermaphroditic and are long and thin?
Schistosomes aka. “blood-flukes”
What does the digestive tract of a digenetic trematode consist of?
oral sucker> mouth> muscular pharynx> esophagus> two blind ceca (either simple or dendritic)
Trematodes have a tremendous reproductive capacity- True or False?
True
What are the 7 developmental stages in the life cycle of a typical fluke?
Operculated Egg> Miracidium> Sporocyst> Redia> Cercariae> Metacercaria> Adult Fluke
What is the normal first intermediate host of any digenetic fluke?
A snail
A single Miracidium will only produce 1 cercariae. True or False?
False- 1 miracidium can produce thousands of cercariae.
The lancet fluke of ruminants
Dicrocoelium dendriticum
Fluke that causes liver poisoning in cats
Platynosomum fastosum
What are the three major reasons for why Fasiola hepatica is such an important ruminant fluke?
- it is the most pathogenic fluke of cattle in the US
- it is a major cause of liver condemnation in slaughter houses, producing a contition known as FASCIOLIASIS.
- it is the best known of all the flukes regarding the details of its’ lifecycle and pathology.
What is fascioliasis?
Liver rot or liver fluke disease
What are the liver flukes of the ruminants?
Fasciola hepatica and fascioloides magna
What are the rumen flukes of the ruminants?
Paramphistomum and Cotylophoron species
what are the 2 syndromes of Fasciola hepatica infection
Acute Fascioliasis and Chronic fascioliasis
