Parasitology Quiz 4 Flashcards
T. pisiformis T. ovis T. hydatigena T. taeniaeformis T. multiceps T. saginata T. solium Echinococcus granulosus & E. multilocularis Dipylidium
What life cycles do tapeworms have?
indirect - metacestodes (larvae) are extra intestinal in intermediate hosts
What is characteristic of the scolex of cestodes?
4 suckers (cyclophyllidea) or 2 bothria (longitudinal grooves that attach)
What is the name for mature segments of the cestodes?
strobila - the whole chain (proglottids - individual segments)
What is the family of all the parasites on this quiz?
cyclophyllidea - circular sucker
What is the dome like projection at the apex of the scolex called?
rostellum
What is the term for the fully developed cestode eggs containing first stage larvae?
oncosphere
What is the term for a single fluid filled cyst with one attached, invaginated scolex?
cysticercus (protoscolex)
What is the term for a fluid filled cyst with many invaginated scolices?
coenurus
What is the term for a cysticercus with an evaginated scolex? (asexual proglottids)
strobilocercus
Which family requires 2 intermediate hosts?
mesocestoididae
What are the direct hosts of taeniidae cestodes?
carnivores or humans
What are the intermediate hosts of taeniidae cestodes?
prey of the DH
What are the DH and IH of Taenia pisiformis?
DH - canids and wild carnivores
IH - rabbits and hares
What are the DH and IH of Taenia ovis?
DH - canids and wild carnivores
IH - sheep
What are the IH of Taenia hydatigena?
cattle, sheep, swine, some wild ungulates
What is hepatitis cysticercos?
condition resembling acute fasciolosis pathology
What is the DH and IH of T. taeniaeformis?
DH - cats
IH - mice and other rodents
What is the DH and IH of T. multiceps?
DH - domestic dog and wild canids
IH - sheep, goats, cattle
What is a coenurus cerbralis?
mature cyst is a large fluid filled cyst bearing clusters of scolices on its internal wall
What taenia species do the IH get coenurus cerebralis?
T. multiceps
What are the CS of coenurus cerebralis?
neurological signs of progressive space occupation, clinical syndrome- True Gid
Where are cystecerci found in the IH of T. ovis?
skeletal and cardiac muscle
Where are cysticerci found in T. hydatigenia?
Cysticercus tenuicolis - liver of sheep or big
associateed with C. novyi
What are the DH and IH of T. saginata?
DH - humans
IH - cattle
What are the DH and IH of T. solium?
DH - humans
IH - pigs
What are the symptoms of T. solium in humans?
cerebral cysticercosis (arizona official died in car accident because of this)
What are the DH and IH of Echinococcus granulosa?
DH - canids
IH - ruminants, man, pig
Where are hydatid cysts located in E. granulosa?
liver and lungs
What kind of hydatid cyst is associated with E. multilocularis?
alveolar hydatid cyst - has CT capsule and grows like malignant neoplasm
What kind of hydatid cyst is associated with E. granulosa?
unilocular hydatid cysts - grow slowly, do not infiltrate
What are the DH and IH of E. multicularis?
DH - canids and cat
IH - rodents (voles and lemmings)
What is the most common tapeworm of dogs and cats?
Diplydium caninum
What do the segments look like in D. caninum?
cucumber seed like and 2 sets of genital organs
What are the intermediate hosts of Dipylidium caninum?
fleas and lice
