Endoparasites Flashcards
(43 cards)
what types of species fall under cestodes?
dipylidium caninum
taenia
echinococcus granulosus
echinococcus multiocularis
spirometra
monezia
diphyllobothrium latum
mesocestoides
dipylidium caninum is also known as what?
double pore tapeworm
cucumber seed tapeworm
spirometra is also known as what
zipper tapeworm
what is the intermediate host for dipyldium caninum?
ctenophelidas felis (cat flea)
what do the echinococcus species consist of?
hydatid cysts
what medication handles both dipylidium caninum and taenia species?
praziquantel
fenbendazole (panacur) - only does taenia species
where is diplyidium caninum located?
small intestine of dogs, cats, ferrets
what is the cycle of dipylidium canine?
individual gravid proglottid will release into the environment via feces, then rupture releasing hexacanth embryos. It then develops into a cystercoid (infective stage) where the adult flea will eat it. The dog/cat will then eat the flea and the cystercoid will attach to the lining of the small intestine
what are the two species of taenia?
Taenia taeniaformis
Taenia pisformisT
Taenia taeniaformis
Host:
Intermediate host:
Host: cat
Intermediate host: rat/rodent
Taenia pisformis
Host:
Intermediate host:
Host: hunting dog
Intermediate host: rabbit/hare
is echinococcus reportable?
yes
Echinococcus life cycle
ova in infected species will pass into environment. It is then ingested (each ovum = one hydatid cyst). Intermediate host will then ingest and it develops into encapsulated cyst (E. granulosus)
Each protoscolex = one tapeworm
Which echinococcus species is most common in humans?
E. granulosus
E. granulosus
Host:
Intermediate host:
Host: dogs
Intermediate host: sheep/goat
E. multiocularis
Host:
Intermediate host:
Host: cat/fox
Intermediate host: mouse
Is there a vaccine against echinococcus?
yes
proliferative sparagnosis
caused by Spirometra mansonomides
can happen when the single sparagum begins to multiply asexually (refractory to treatment) FATAL
Where is spirometra located in dogs and cats?
pseudotapeworms are located in the small intestine
Life cycle of Spirometra
operculated eggs exit the centrally located uterus through the associated pore
upon contact w/ WATER, the eggs will hatch releasing the CORACIDIUM (motile hexacanth embyro). The FIRST INTERMEDIATE HOST, microscopic crustecean will ingest and turn the CORACIDIUM –> PROCERCOID. the SECOND INTERMEDIATE HOST, frog, snake, mouse will ingest and term the PROCEROID –> PLEROCERCOD SPARAGUM. This stage will intertwine in the SQ muscles of the 2nd I.H. The DEFINITIVE HOST will then ingest the 2nd I.H. which the sparagum will emerge from tissue site and attach itself to mucosa lining of the stomach and MATURE into an adult
What happens if a dog or cat ingests the aquatic crustean containing the proceroid or the second I.H. containing the plercorcoid/sparagum?
may migrate to SQ tissues and causing proliferative sparagnosis
What are the three ways humans can become infected w/ SPIROMETRA?
1) drinking water containing 1st I.H. –> 2nd I.H. containing the pleroceroid stage in SQ tissues
2) ingesting 2nd I.H. (raw frogs containing plercoid stage –> migrate and infest SQ tissues)
3) if a poultice made from 2nd I.H. (frog) containing the plercercoid/sparagnum stage –> migrate to SQ tissues
Mesocestoides are found where?
small intestine
dogs, cats, wild animals, birds
Mesocetoides species
Host:
Intermediate host:
Host: dogs, cats, wild animals, birds
Intermediate host:
1) oribatid mite
2) rats and mice
