we went through before I guess - should probably know this pretty well
figure this out using prior slide I guess
(give normal names)
1-3. in picture
4. dicrocoelium dendriticum
1. common liver fluke
2. giant liver fluke
3. large american liver fluke
4. lancet fluke
1. cause of what?
2. world, most of US - in minnesota?
1. liver fluke disease, liver rot or hepatic distomiasis
3. sheep, cattle, llamas (human)
4. amphibious, right handed snails (Lymnae)
(Life Cycle of Fasciola Hepatica)
1. IH - only in what?
1. the snail
1. penetrates what?
2. migrates to the liver via what?
3. then penetrates what?
1. intestinal wall
2. peritoneal cavity
3. liver capsule
1. migrates in hepatic parenchyma for how long?
2. enters what to mature in a few weeks?
(Acute or Chronic)
(Pathogenesis - Acute)
1. migration of what where?
2. depends on what?
1. juvenile flukes in the liver parnchyma
2. how many flukes were ingested
(Acute or Chronic)
(Pathogenesis - Chronic)
1. adults where? do what?
2. then tell me all the other stuff that happens
1. adults in biliary ducts - feed on lining
1. if get enough necrosis can get what?
2. then open to what?
1. black disease
2. clostridium novyi
fluke eggs don't float.... that's what they usually do - so they use sedimentation
1. What's the best way to identify fluke eggs on a fecal?
1. FLUKE FINDER
2. causes what?
5. Accidnetal hosts?
1. large north american liver fluke
3. white tailed deer
4. lymnaea, Stagnicola
5. sheep, cattle, llama, moose, elk
1. can flukes mature in sheep and goats?
2. what are required to complete life cycle?
1. asymptomatic with up to how many flukes?
(Cattle, Pigs, Moose)
1. flukes, form cysts with a thick wall
2. do flukes reach sexual maturity?
3. do cysts communicate with bile duct?
4. are eggs found in feces?
5. can they cause disease?
2. they may
5. only heavy infections
(look at pic)
1. do flukes mature?
2. eventually cause what?
3. how many flukes to cause death?
4. most deaths when?
1. no - they continue to migrate
2. death of the host
3. can be a single one (through major blood vessel)
1. aka what?
1. lancet fluke
3. 1st a land snail = Cionella
2nd an ant = formica
ants love the slime balls