5 Written Questions
5 Matching Questions
- Paragonimus westermani - how many species known to infect humans? 2. Adult resides where? 3. Hosts - anything unusual?
- D. dendriticum - 1. Acetabulum 2. morphology 3. reproductive system 4. egg 5. what occupies middle third of organism?
- Dicrocoelium dendriticum and Paragonimus westermani are 1. mono/di genean parasites? 2. mono/heteroxenous 3. hosts 4. size
- D. dendriticum has how many I.H.? What are they
- Common name for D. dendriticum - why?
- a 1. 1 of 7 or more known species of Paragonimus that infect humans. 2. Adult resides in the lung 3. DH is many carnivorous animals. I.H is snail, then 2nd IH is freshwater crab and crayfish. Paratenic hosts possible if birds or small mammals eat crayfish or crabs
- b Lancet fluke, pointed body
- c 1. distome 2. pointed ends 3. Testes are anterior to ovary. Prominent uterus, 4. Operculated egg 5. Vittelline glands occupy the middle third of the organism.
- d 1. digenean 2. indirect life cycles - 2 I.H. 3. First I.H is a snail 4. D. dendriticum similar in length as P. westermani, but half the size.
- e 2. 1ST I.H. = Snail. 2nd = Ant
5 Multiple Choice Questions
- because we don't eat infected ants on grass.
- P. westermani
- 1. distome 2. monoecious but prefers cross fertilization 3. Adults look like coffee beans and are unusually thick 4. Tegument covered in spines 5. reproductive system - ovaries left of midline, vitelline follicles at lateral ends.
- Most are asymptomatic - look for eggs in feces. Treat with praziquantel, expensive, or benzimidazoles. Control is difficult because of crazy life cycle. - snails and ants hard to control. Have to keep tabs on your grazing times.
- F. hepatica -except that there is no trauma to gut wall or liver parenchyma due to juvenile migration. You see a lot of biliary and liver damage -inflammation, fibrosis, hepatic degeneration, cirrhosis, bile duct distention/dysfunction
5 True/False Questions
D. dendriticum adults live in → bile duct
Diagnosis of p. westermani - can often be mistaken for, in brain? → finds eggs in sputum or feces, biopsy, ELISA, x ray or CT. Can often be mistaken for tuberculosis, pneumonia, spirochaetosis in lungs, or tumors, encephalitis, hydatids in brains.
Paragonimus westermani life cycle → Praziquantel.
D.H for D. dendriticum are → sheep, cattle, goats, pigs
Pickling does not kill → Praziquantel.