Order Spirurida Flashcards
1
Q
What are some general features of Filarioidea?
A
- long slender worms and simple anterior and posterior ends.
- in blood or lymph vessels, body cavities or connective tissues.
- indirect life cycle
- eggs contain larvae or microfilariae
2
Q
What are some features of the Filariidae family?
A
- in skin causing lesions
- attract IH to take eggs or larvae
3
Q
Where is parafilaria multipapillosa found?
A
- horses
- nodules are in subcut or in IM connective tissue of muscles and shoulders.
4
Q
Where is parafilaria bovicola?
A
- cattle in subcut or IM of connective tissue
5
Q
What are some features of Dirofilaria immitis?
A
- can cause cardiopulmonary pathology and even death in canids.
- it can infect humans but it wont mature.
- elongated and filiform
- male = curled posterior
- female vulva = close to anterior end
- adults in pulmonary artery (right ventricle)
- microfilaria
- IH = mosquitoes which are infected with microfilaria.
6
Q
What are some features of Onchocerca cervicalis?
A
- horses
- nuchal ligament
- microfilaria
- cause alopecia, scaling and crusting
7
Q
What are some features of Onchocerca reticulata?
A
- hosrses
- connective tissue of flexor tendons and suspendory ligaments of fetlock.
8
Q
What are some general features of family Trichinellidae, genus trichinella?
A
- larvae in the muscles
- depends on carnivorism to transfer
- encapsulated species (t.spiralis) and non-encapsulated species
- adults are in the small intestine and larvae are in striated muscles.
- infections by eating striated muscles of infected animals.
9
Q
What are some features of family Trichuridae genus Trichuris?
A
- anterior end is thinner than posterior end
- yellow eggs with clear plugs
- location in large intestines (caecum and colon)
- direct life cycle
- male have a coiled with one
- very resistant to environment
10
Q
Where are Trichuris vulpis?
A
- in mammals
- infection by ingestion of embryonated eggs
