FEC practical Flashcards
2 common adult worms in puppies - describe eggs
Toxocara and Toxascaris - similar in gross appearance, typical strongyle egg size (80micrometers), both round
Description of adult Toxocara and Toxascaris appearance
Both large (up to 10cm), thick, cream-coloured nematodes
Size of liver fluke egg
140 micrometers, operculum releases ciliated miracidium
Where do adult liver flukes live? What do they do/cause?
Bile duct. Suck blood (causes anaemia if many are present)
IH - liver fluke
Snail
Size - Eimeria/coccidian oocyts
Small, 20-30micrometers long
Size - Nematodirus battus eggs
Large - 160 micrometers
Are coccidian or strongyle eggs most likely linked with diarrhoea in lambs in June?
Coccidia - Strongyle eggs would only be starting to build up in June.
Name different nematodes of horses that produce strongyle eggs
Quite a few different nematodes - include large (Strongylus spp) and small redworms (many different genera)
What are helminths?
Cestode, nematodes and/or trematodes
Ruminant helminths - 7
Strongyles, Nematodirus, Strongyloides, Trichuris, Fasciola, Dicrocoelium and Moneizia
Do you find lungworm eggs in ruminant faeces?
No - the eggs hatch before they are passed so larvae are found in the faeces
Horse helminths - 7
Strongyle, Dictyocaulus, Strongyloides, Oxyuris, Parascaris, Fasciola, Anoplocephala
Pig helminths - 3
Strongyles, Ascaris, Trichuris
Dog and cat helminths - 7
Strongyle, Toxocara, Toxascaris, Trichuris, Capillaria, Taenia, Dipylidium
Poultry helminths - 4
Strongyle, Syngamus, Ascarid, Capillaria
Why is it difficult to define the significance of particular FECs? 3
Many variables:
- different worm spp produce different numbers of eggs daily (Ostertagia - few, Haemonchus - many)
- faecal volume
- immune and reproductive status of host et
What are guideline egg counts for moderate and high levels?
MODERATE: 500 e.p.g. (eggs per gram)
HIGH >1000 e.p.g.
Which strongyle worms produce strongyle eggs in ruminants? 5
Ostertagia, haemonchus, trichostrongylus, cooperia, chabertia etc
How can Nematodirus battus be differentiated from other nematodirus spp?
N.battus is brownish with flat sides
Distinguish Strongyloides from Strongyle eggs
Small and rounder than a strongyle egg, larvated
Appearance - trichuris
Brown, barrel shaped, plug at each end
Appearance - fasciola
Large, ovoid, operculate, brown, contain yolk cells
Appearance - Dicrocoelium
Small, dark brown, thick shelled, asymmetrical eye spots
