Trematodes Flashcards

Question	Answer		Article
What are the most diagnostic features of the Fasciola hepatica egg?	Oval and brown Granular contents Operculum ('trap-door') at one end Double the size of a typical strongyle egg		Link to Article
Fill in the missing words about Lymnaea truncatula: Lymnaea truncatula is the intermediate host for (???). It is found in ???, and feeds on ???. It has a ??? with 5-6 spirals.	Fasciola hepatica muddy areas slimy green algae brown-black shell		Link to Article
What is the post mortem appearance of the liver in cases of acute fasciolosis?	Haemorrhagic tracts Enlarged, pale and friable		Link to Article
What time of year do the clinical signs of chronic fasciolosis become apparent?	January - March		Link to Article
Why is Dicrocoelium less pathogenic than Fasciola?	Migrates directly up the common bile duct and therefore does NOT migrate through the parenchyma (unlike Fasciola)		Link to Article
Is Paramphistomum found in the UK?	Rare in the UK, but can cause severe losses in ruminants in the wet tropics		Link to Article
What is the major cause of pathogenicity in schistosome infections?	The eggs have a spike to help them work their way into the intestine or urinary bladder This causes mechanical damage and inflammatory responses that are exacerbated by antigens released by the eggs		Link to Article