Flashcards in Tapeworms:Pseudophyllideans Deck (44):
What are the defining characteristics of cestodes?
Dorsally flattened, suckers often present, segmented, tegument, no gut, hermaphroditic, eggs with hexacanth larvae, indirect life cycle
What characteristics do adult cestodes have?
Scolex, neck, and proglottids
What are the characteristics of Pseudophyllidea?
Scolex with two bothria, no suckers, very similar to flukes, produce eggs individually
What are the hosts of Diphyllobothrium latum?
Human, dog, bear, other fish-eating mammals
What is the life cycle of Diphyllobothrium latum?
Adults live in the SI of the DH, eggs pass in feces, egg embryonates and coracidium hatches, ingested by copepod and procercoid develops, ingested by fish (pike) and larva develops into infective stage. Mammal ingests fish and larva is released, tapeworm travels to SI.
What are the clinical signs of D. latum?
Non-specific abdominal disturbance, competes for vitamin B12
How does one diagnose D. latum?
ID eggs in feces
T/F Praziquantel and epsiprantel can be used to treat D. latum.
What are the IH and DH of Spirometra mansonoides?
DH **cats**, dogs and other carnivores; IH 1st copepods, 2nd birds, reptiles, amphibians
What are the characteristics of cyclophylidean tapeworms?
Body covered in tegument, scolex has suckers and a rostellum, rostellum may have a row of hooks, proglottids are shed, and eggs are released as segment degrades
What stage of cyclophylidean is found in the IH?
larvae, intends to infect DH, specific to genera
What is the DH and IH of Davainea proglottina?
DH poultry, IH slug or snail
What are the clinical signs of Davainea proglottina?
Inflammation, hemorrhagic enteritis, necrosis, usually a wasting disease
How does one diagnose Davainea proglottina?
Adults in duodenum, small egg with 6 hooks
What does one use to treat D. proglottina?
Prevention to keep snails away, usually no treatment used
What are the characteristics of Raillietina echinobothridia?
Very pathogenic, ant as an IH, produces TB-type nodules in the gut
What are the characteristics of the family Anoplocephalids?
Tapeworms of horses, scolex with 4 suckers, no rostellum, no hooks, proglottids wider than they are long, 2 reproductive systems per progrlottid, eggs has pyriform apparatus with 6 hooks, mites are IH
What are the IH and DH of Anoplocephalids?
DH horses mules, donkeys and zebras; IH oribatid mites, free living
What is the life cycle of Anoplocephalids?
Adults in guts, segments break off and pass out, release eggs, orbatid mites ingest eggs, cystercercoid develops within mite, mite ingested by horse with vegetation, develop to adults in intestines
What are the clinical signs of Anoplocephalids?
Most asymptomatic, unthriftiness, digestive problems
What are the possible clinical signs of A. magna?
Large numbers may cause a catarrhal enteritis
What are the clinical signs of A. perfoliata?
Most pathogenic because it centers around ileocecal valve, occlusion of ileocecal valve, ulceration
What are the clinical signs of A. mamillana?
How does one diagnose an anoplocephalid infection?
History, egg with pyriform apparatus
How does one prevent or control an anoplocephalid infection?
Manure dispersal, pasture rotation, strategic deworming
What are the characteristics of Moniezia?
Scolex has no hooks or rostellum, each proglottid has two sets of reproductive organs
What is the life cycle of Moniezia?
Adults live in SI, proglottids shed in feces, eggs ingested by oribatid mite, infective larval stage develops in 1-4 months, DH ingests mite while grazing, cysticercoid released, adult develops in intestines
What are the clinical signs of Moniezia?
True or false, Moniezia can be treated with albendazole and fenbendazole.
What are the hosts of Thysanosoma actinoides?
Sheep, goats, wild ruminants
Where are Thysanosoma actinoides located in the body?
SI, bile and pancreatic ducts
What is the DH and IH of Taenia saginata?
DH human, IH cattle
What is the larval stage of Taenia saginata calleD?
What do the eggs of Taenia saginata look like?
hexacanth embryo (6 hooks), oval
What is the life cycle of Taenia sagninata?
Why is Taenia saginata a parasite of human importance?
Humans are the DH, infected by ingestion of under-cooked beef, sanitation will remove the problem
What are the clinical signs of Taenia saginata in both humans and cattle?
Human- non-specific gastric symptoms, cattle-asymptomatic, found on slaughter
How can one control Taenia saginata?
Don't allow humans to defecate in feedlots
What are the DH and IH of Taenia solium?
DH humans, IH swine
What is the common name of Taenia solium cysticerci in the muscle of pigs?
What is the life cycle of Taenia solium?
What is the public health significance of Taenia solium?
Humans can also be an IH, larvae are neurotrophic
What are the clinical signs of Taenia solium in humans and swine?
Humans (DH) non-specific gastric symptoms, IH CNS signs; swine asymptomatic