(DON'T STUDY) Subfamily CYATHOSTOMINAE Flashcards
How are cyathostominae described as?
Small strongyles and NON MIGRATORY
like other strongyloids the buccal capsule is relatively?
large
it is usually ___ and ___ are present
straight-sided & leaf crowns
Most do or don’t have teeth?
do not
males have a ____ bursa which ___ with a ___ view
males have a copulatory bursa which is elongated dorsally in side view
What are they sometimes called?
red worms
What are the characteristics of the buccal capsule that identify cyathostomes?
- Rectangular shape from lateral view
- leaf crowns
- no teeth
Cyathostomes have ___ life cycles; the infective is the ____ larvae stage which is infective by the ______
- direct life
- third
- oral
After entering the definitive host, cyathostome larvae exsheath in the small/large intestine and thereafter undertake/do not undertake a period of migration ultimately maturing in the small/large intestine.
Small intestine
do not undertake
large intestine
Name the genus in the Superfamily Strongyloidea that may induce nodule formation, occurs in ruminants and pigs and name the most common species in cattle, sheep and pigs in New Zealand.
Oesophagostomum:
cattle - Oe. radiatum
sheep - Oe. venulosum
pigs - Oe. dentatum
What species of this genus (See Question 3) is important in sheep in Australia and how may it be distinguished from the species occurring in sheep here?
Oe. columbianum - has wide cervical alae; those of Oe. venulosum are narrow.
What host reaction to some species may be associated with larval stages and causes severe pathological effects?
Nodule formation in the mucosa/submucosa.
The strongylid nematode __________ (name) is found in the _________ (organ) of ruminants; it is characterised by a large bell-shaped buccal capsule; it migrates/does not migrate in the host.
Chabertia ovina, colon
does not migrate.
