Strongylida 1 Flashcards
secernentea taxonomy
kingdom- Animalia
phylum-Nematoda
class- secernentea
secernentea (phasmids) ->
bursate nematodes (thread worms)
secernentea body
- pseudoceolomates (tubes within tubes)
- mouth and anus
secernentea body plan
based on high internal pressure (if you stick a needle in or soak in water it will pop)
secernentea lifecycle
Develop from eggs
- Both male & female sexes
- Egg -> L1 -> L2 -> L3 -> L4 -> Adult
- L1 or L3 hatches depending on species
- Molt b/w each stage!
secernentea id
Bursa – Male repro organ on posterior end for grabbing females
- Spicules – Male repro organ for copulation, male sticks it into females
secernentea transmission
- 3rd stage larva is infective stage
- hosts get 4th stage larva in them which develop into adult
secernentea diagnosis
patency = point at which dx can be diagnoses ppp= prepatent period
strongylida taxonomy
kingdom- Animalia
phylum-Nematoda
class- secernentea
order- strongylida
trichostronglyoidea taxonomy
kingdom- Animalia phylum-Nematoda- bursate class- secernentea order- strongylida family- trichostronglyoidea
trichostronglyoidea host
- rumiants
- no intermediate hosts
trichostronglyoidea id
- small buccal cavity
trichostronglyoidea lifecycle
direct
trichostrongyoidea transmission
larvae hatch and crawl up grass then get eaten by ruminants
trichostrongyoidea organ effected
gi tract
trichostrongyoidea dx
- extreem d+
- dehydration
- bottle jaw
trichostrongyoidea diagnosis
find egg or larva in feces
trichostrongylus taxonomy
kingdom- Animalia phylum-Nematoda-bursate class- secernentea order- strongylida family- trichostronglyoidea genus- trichostrongylus
trichostrongylus host
ruminants
trichostrongylus id
v small
trichostrongylus life cycle
- larva resistant to freezing and drying
- hypobiosis
- arrested development in abomasa mucosa!
- 3rd stage larva enter gut mucosa after being invested
trichostrongylus organ effected
abomasum or duodenum
trichostrongylus dx
watery dark green d+ that predisposes to fly strike
trichostrongylus location
important in new Zealand
trichostrongylus axei taxonomy
kingdom- Animalia phylum-Nematoda-bursate class- secernentea order- strongylida family- trichostronglyoidea genus- trichostrongylus
trichostrongylus axei host
- cattle, sheep, goat
trichostrongylus axei organ effected
abomasum
trichostrongylus colubriformis taxonomy
kingdom- Animalia phylum-Nematoda-bursate class- secernentea order- strongylida family- trichostronglyoidea genus- trichostrongylus
trichostrongylus colubriformis host
sheep and goats
trichostrongylus colubriformis organ effected
small intestine
ostertagia taxonomy
kingdom- Animalia phylum-Nematoda-bursate class- secernentea order- strongylida family- trichostronglyoidea
ostertagia host
cattle
ostertagia lifecycle
- larva can overwinter in pasure
- arrest as l4 in gastric glands