2. Lecture: TAPEWORMS: Taenosis-cysticercosis and coenurosis Flashcards
parasites and hosts - TAENIA, SAGINATA and TAENIA SOLIUM in farm animals ? , TAENIA TAENIAFORMIS in cats? TAENIA OVIS, TAENIA HYDATIGENA and TAENIA PISIFORMIS in dogs?
-T.saginata=beef tapeworm: human-cattle cycle
-T.solium=pork tapeworm: human-pig cycle
-T-taeniaformis=
-T.ovis, T.hydatigena, T.pisiformis=dogs, fox, wild canids, mustelids,dig
morphology of cysticercus and coenurus?
-cysticercus-1 head, fluid-filled-cyst, head attatched to cyst wall
-coenurus-dozens of heads, fluid-filled cyst, heads attatched to cyst wall
how many genital pores does an adult TAENIA have on segments?
genital pose on 1 side
eggs of family TAENIIDAE, what are they like and in which genera do they occur?
thick RADIATE shell, bilayered shell, radially striped shell, content: larva (oncosphere) and 3 hooks, size 20-40 micrometer>hooklets visible within (6-hooked oncosphere)
life cycle, where do adults live and in what animal, how does intermediate host become infected? (TAENIAE)
-adults live in carnivore intestine
-IH ingest eggs or proglottids via feces
FH: carnivores/omnivores
IH:ungulates/rodents
how does FH get infected?
after ingestion of infected tissue
how long prepatent period?
2-3 months
TAENIAE SAGINATA: hosts, metacestode, transmission to definitive host and IH?
-hosts : humans, ruminants
-metacestode: cysticercus
-transmission to DH: eating raw beef contaminated with cysticercus
-transmission to IH: -eating eggs/proglottids on pasture, -feeding milk contaminated with eggs to calves
what is cysticercosis?
T.saginata larval stage in bovine = cysticercoid disease
where is T.saginata cysticerci most likely to be found in body of cattle?
heart, master, tongue, triceps, diaphragm
T.solium : hosts, metacestode, transmission to IH and FH?
-FH: humans
-IH: pigs, humans, dogs
-FH transmission>eating raw pork
-IH transmission: reverse peristalsis, eating eggs, eggs hatch into intestines
where can T.solium cysticerci can be found in IH?
muscles, skin, eyes, brain
taenia in dogs: who are main IH of taenia species infecting dogs?
-IH prey animals
-T.multiceps most prevalent in dogs
who Is main host of T.taeniaformis infecting cats?
cats-rodent cycle
disease symptoms: what causes disease symptoms and who has them more pronounced, FH or IH?
-proglottids in faeces /vomit
CS rare
-neurological signs (circling, aimless running, cramps)
-T.taeniaeformis more in rodent
-T.multiceps : FH
