5 Written Questions
5 Matching Questions
- Treat P. westermani with
- Common name for Paragonimus westermani
- Diagnosis of p. westermani - can often be mistaken for, in brain?
- Does not require aquatic habitat to complete life cycle
- How to diagnose D. dendriticum? Treatment? Control?
- a D. dendriticum
- b 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.
- c Praziquantel.
- d lung fluke
- e 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.
5 Multiple Choice Questions
- 1. Eggs in feces 2. (Cionella lubrica in U.S snail eats egg) 3. Miracidium in snail intestine to digestive gland 4. mother sporocyst to daughter sporocyst 5. no redia - to cercaria (tailed). 6. Cercaria accumulate in mantle cavity and irritation causes mucous building and slime balls 7. (Formica fusca ant eats slime ball and ingest cercaria) 8. Cercaria penetrate ant gut and encysts as metacercaria inside ant hemocoel 8. One cercaria migrates to subesophageal ganglion and becomes brainworm and alters ant behavior. Remains at grass tip and eaten 9. Ruminent eats ant and metacercaria excyst in duodenum, juveniles migrates to bile duct. Adults in bile duct produce eggs.
- 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
- P. westermani
- 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.
- 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
Common name for D. dendriticum - why? → Lancet fluke, pointed body
D. dendriticum has how many I.H.? What are they → 2. 1ST I.H. = Snail. 2nd = Ant
How do humans usually get infected with P. westermani? → By eating raw or undercooked crab with metacercariae.
Pathology and Symptoms of P. westermani → lung fluke
Paragonimus westermani - 1. acetabulum 2. sex 3. morphology 4. tegument 5. reproductive system → 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.