Day 12: Trematode Structure Flashcards
What is the phylum of trematodes
Plathelminthes
What is the structure of trematode
Bilaterally symmertrical
Dorsoventrally flattened
lack a coelom
Lack complete digestive tract
Digenea have two suckers for attachment
What is the physiology of trematodes
Food is taken in at mouth and across tegument
Undigested material in gut is regurgitated=
Excretory system is made up of ciliated flame cells which push metabolic waste products along tubules to the exterior
Some materials absorbed across surface
What are the general characteristics of trematodes
Hermaphroditic, both self and cross ferilization
Sexual reproduction in a definitive host
Asexual reproduction in a snail host
High specificity for first intermediate host
What is a ruminant trematode called
Fasciola hepatica
What is the morphology of Fasciola haptacia
20mm
internal organs are highly branched and difficult to distinguish
What is the distribution of Fasciola hepatica
Florida
Lousiana
Texas
West coast
What are the clinical signs of Fasciola hepatica in sheep
Acute severe disease
Distended painful abdomen
Anemia
Sudden death due to liver damage
Clostridium novyi contributes to this
What are the clinical signs of Fasciola heptaica in cattle
Asymptomatic to chronic
Anorexia and weight loss
Anemia
Hypoproteinemia
Diarrhea or scant feces
What is the pathology of Fasciola hepatica
Hemorrages and migratory tracts in liver
Diffusely fibrotic and cirrhotic liver
interstital hepatitis
Which species has a “self-cure” due to acquired immunity for Fasciola heptatica
Cattle
How do you diagnose Fasciola heptaica
Oval operculated golden brown eggs found in fecal flotation or sedimentation
Fluke eggs will not be found in the feces during the acute stage
How do you control Fasciola hepatica
Reduce worm burden in host
Routine deworming in spring and fall
Reduce snail population
Reduce exposure of cattle or sheep to contaminated areas
What is the morphology of fascioloides magna
Large leaf shaped parasite
Where are fascioloides magna common
Great Lakes area