5 Written questions
5 Matching questions
- Common name for Paragonimus westermani
- Does not require aquatic habitat to complete life cycle
- Paragonimus westermani - 1. acetabulum 2. sex 3. morphology 4. tegument 5. reproductive system
- D. dendriticum - 1. Acetabulum 2. morphology 3. reproductive system 4. egg 5. what occupies middle third of organism?
- John and his gf went out and had crab at a sketchy restaurant and now he is having breathing difficulties, what could he have?
- a 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.
- b lung fluke
- c D. dendriticum
- d 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.
- e P. westermani
5 Multiple choice questions
- sheep, cattle, goats, pigs
- 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.
- Adult in lung, eggs in sputum or swallowed and in feces. 2. eggs hatch to miracidium 3. miracidium in snail to sporocyst to redia to cercaria 4. spined cercaria with knob tails are released to invade 2nd I.H like crab or crayfish. 5. they encyst as metacercaria and 2nd I.h eats them. 6. excyst in duodenum of 2nd IH. 7. Juvenile penetrate the intestine and embed in abdominal wall. 8. we eat the 2ND IH 9. Juvi's reenter coelom, penetrate coelom and migrate to our lungs. 10. They find a mate, and form cyst in lungs. 11. mature into adults
- 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
- Lancet fluke, pointed body
5 True/False questions
Dicrocoelium dendriticum and Paragonimus westermani are 1. mono/di genean parasites? 2. mono/heteroxenous 3. hosts 4. size → 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.
D. dendriticum adults live in → sheep, cattle, goats, pigs
Treat P. westermani with → Praziquantel.
Paragonimus westermani - how many species known to infect humans? 2. Adult resides where? 3. Hosts - anything unusual? → 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
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.