5 Written questions
5 Matching questions
- Paragonimus westermani - 1. adults live where and how? 2. Eggs passed how? 3. After how long does egg hatch 4. What species of snail is IH? 5. Life stages
- Treat P. westermani with
- Pathology and Symptoms of P. westermani
- Geographic distribution of D. dendriticum - habitat?
- Geographic distribution of Paragonimus westermani
- a Europe, Asia - 45% of cattle in switzerland. Some in USA and Australia. Habitat is grasslands where herbivores graze.
- b Praziquantel.
- c Migration of juveniles through coelom to lungs doesn't cause much damage, unless certain special tissues are hit. But once they get into lungs they stimulate an inflammatory response that surrounds the pair in granular tissue - causing ulcers, bleeding, fibrosis. Eggs form granulomas. Symptoms are breathing difficulties, chronic cough, bloody sputum - and if juvis migrate to spinal cord or heart or brain they can cause paralysis, heart attack or death from granulomas.
- d 1. Adults in DH live in lungs, pair up 2. Eggs in sputum or swallowed and passed in feces. 3. After at least 16 days in water miracidium hatches. 4. Thieridae snail is IH. 5. adult/egg/miracidium/sporocyst/redia/cercaria ( inside snail
- e Asia, Africa, Central and South America. About 20 million people infected. Habitat is swift flowing streams and snail habitats.
5 Multiple choice questions
- 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
- Lancet fluke, pointed body
- 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. 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.
- similar to P. westermani, form of lung fluke. In US, fun research saying that they had alcohol and ate weird **** and got this parasite.
5 True/False questions
Common name for Paragonimus westermani → lung fluke
Paragonimus westermani - how many species known to infect humans? 2. Adult resides where? 3. Hosts - anything unusual? → 1. Adults in DH live in lungs, pair up 2. Eggs in sputum or swallowed and passed in feces. 3. After at least 16 days in water miracidium hatches. 4. Thieridae snail is IH. 5. adult/egg/miracidium/sporocyst/redia/cercaria ( inside snail
Paragonimus westermani - 1. acetabulum 2. sex 3. morphology 4. tegument 5. reproductive system → 1. Adults in DH live in lungs, pair up 2. Eggs in sputum or swallowed and passed in feces. 3. After at least 16 days in water miracidium hatches. 4. Thieridae snail is IH. 5. adult/egg/miracidium/sporocyst/redia/cercaria ( inside snail
How to diagnose D. dendriticum? Treatment? Control? → 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.
Dicrocoelium dendriticum and Paragonimus westermani are 1. mono/di genean parasites? 2. mono/heteroxenous 3. hosts 4. size → Asia, Africa, Central and South America. About 20 million people infected. Habitat is swift flowing streams and snail habitats.