nematoda exam 2 Flashcards
What are the four superfamilies under the order strongylida
trichostrongyloidea, strongyloidea, ancylostomatoidea, metastrongyloidea
most important ruminant helminth?
trichostrongyloidea (ostertagia ostertagi)
indirect lifecycle superfamily?
metastrongyloidea
What are the two types of trichostrongyles that are in the abomasum?
haemonchus and ostertagia
PGE occurs in what superfamily?
truchostrongyloidea
small ruminant important helminth? (barbers pole worm)
haemonchus contortus
which helmith destroys the gastric gland which L4 migrates out
ostertagia ostertagi
what is the pathogenic stage of haemonchus contortus?
adult. hematophagosis
when you see a sudden death of a flock, what helminth should you think of?
haemonchus contortus
what is type 1 and type 2 disease in the two abomasum trichostrongyles?
type 1 is continuous, type 2 hypobiosis: more severe and fatal
any sheep or goat with anemia in grazing season is thought to have ______ until proven otherwise
haemonchus contortus
the superfamily strongyles are important helminths for what species?
horses
what helminths are plug feeders?
strongyles
what are the two emerging patterns for cyanthostomins? (small strongyles)
drug treatment: killing off the adult worms in the intestine
seasonal changes
rapid emergence of larvae (type 2)
what is the important large strongyle
strongylus vulgaris. Colic r-ship
which molt in stronglyus vulgaris is amin pathogenic step
the molt from L4 to adult in the cranial mesentery artery. producing an aneurysm
what superfamily is considered hookworms
ancylostomatoidea
what is the scientific name for the most important canine hookworm in our region
ancylostoma caninum
what type of strongylida can have a paratenic host?
ancylostoma caninum
what are the five ways an adult hookworm can end up in the intestine
skin penetration, transmammary infection, ingestion of L3, larval leak, paratenic hosts
feline hookworm?
ancylostoma tubaeforme
two classifications under spirurida
filaroidea and non filaroidea
what type of lifecycle does order spirurida have?
indirect lifecycle with arthropod as intermediate host
dirofilaria immitis. definitive host? site of parasite
heartworm. dogs. pulmonary arteries
three main clinical signs of dirofilaria immitis
chronic cough, dyspnea, decreased exercise tolerance
what is wolbachia
bacteria with a symbiotic relationship to dirofilaria immitis (spirurida). the reason why we give doxy in the HWT
habronema and Draschia. definitive host? intermediate host?
house fly. horses. nonfilaroidea. summer sore cutaneous granuloma in horse when in incorrect location
physaloptera
wild animal. nonfilaroidea. spirurida. nonpath stomach parasite
thelazia
eye worm. zoonotic
what is unique about enoplida eggs
2 polar plugs, like a football. whipworm. larvae develop in egg until ingested
Truchuris vulpis. what is the infective stage?
enoplida. whipworm in L.I. of dogs. embryonated egg
PPP of trichuris vulpis
3 months. not usually a problem in young puppies becuase of this
Trichinella. where are adults? importance?
enoplida. worms in S.I. of many mammals. assocation with pigs
Oxyurida. what is unique about their eggs?
one polar plug, one flat side and one round side.
oxyuris equi. order? reporduction
equine pinworm in oxyurida. female migrate to the anus, around perianal area and explode. no eggs in feces
why is rhabditida wierd?
its animal genus is strongyloides.
what is the name for rhabditida eggs?
strongyloides eggs. smaller than strongyles eggs
which orders have adults in the large intestine?
oxyurida (pinworm), enoplida (whipworm)
