protozoa exam 3 Flashcards
what is the transmission of apicomplexa
infective stage is sporuylated oocysts in the feces.
where does sporogony occur in eimeria?
in the feces outside of the host. not immediately infective
who gets eimeria?
poultry and ruminant coccidia. GI issues.
what is the pathogenesis of coccidiosis (eimeria and cystiospora)
disease is caused by the destruction of cells after schizogony when the meriozoites emerge and rupture the cells. reoccuring step that can cause severe damage.
Eimeria and cystisospora. life cycle? direct? indirect?
direct for both. but cysti can have a paratenic host of a rodent.
what is the diagnostic stage of coccidosis (GI)
fecal float. need to see oocysts.
what is a tell-tale sign of coccidosis (eimeria or cystisospora)
stained perianal area from feces with diarrhea.
what is the domestic host of toxoplasma gondii? what other species is affected?
cats are the DH. they cause abortion in sheep and goat.
which lifestages are infective in t. gondii? which is the best in terms of pathogenicity?
sporyulated oocysts, brady and tachyziotes. ingested encysted bradyziotes from mice are the most pathogenic and cause the infection most commonly in cats
which stage of toxoplasma gondii is the pathogenic stage?
tachyziotes.
Neospora caninum what animals does it affect?
DH is a dog. but cows and some sheep can get it and it will abort fetuses.
scarcocystis neurona. what does it cause?
equine protozoal myelencephalitits
what is the DH and IH in sarcocystis neurona.
opossum. IH- skunk raccoon, armadillo
where does sporogony occur in sarcocystis? (EPM)
in host. feces immediately infective
type of lifecycle of sarcocystis?
indirect. carnivore DH and prey IH
what life cycle is Toxoplasma
it can be direct, ingestion of sporoulyated oocysts or it can be indirect, ingestion of zoites from rodents
what are the domestic tick borne protozoa?
babesia canis (dog- anemia) and cytauxzoon felis (anemia cat).
cryptosporidium is intracellular but _______
extracytoplasmic
what causing self limiting neonatal diarrhea in calves
cryptosporidium
which tick borne protozoa is eradicated from the US
babesia in cattle
giardia duodenalis. what is the pathogenic stage?
trohpoziote. sucks and damages mucosa
how to diagnose giardia?
fecal smear. have to find cysts and also have diarrhea
which flagellated protozoa are zoonotic
giardia (technically), leishmania, t. cruzi
tritrichomonas foetus. what does it cause and how do you treat it?
causes early embryonic death, high rate of open cattle, infertility. cull the bulls and give sexual rest to the cows. STP
chronic large bowel in cats that is self limiting
T. blagburni
T. gallinae presents with what symptoms?
Upper respiratory issues and crop issues
where do you find the t. cruzi trypomastigote and amastigote
trypomastigote is extracellular swimming and the amastigote is inside cells with no flagella.
how is t. cruzi transmitted
fecal material from kissing bug enters opening on animal. ingestion of the bug. vertical transmission
what cells do leishmania bother
monocytes in humans and canines
what is the transmission of leishmania? in the us?
biting of the sand fly. in the us, vertical transmission through fox hound bloodlines, and fighting animals.
transmission route for cryptosporidium?
oral
