Helminths Flashcards
(26 cards)
Where are Anoplocephala perfoliata cestodes (tapeworms) found?
Small intestine
Ileocaecal junction
Anoplocephala perfoliata is present all year round, but particularly in which months?
Winter
How is Anoplocephala perfoliata diagnosed?
FEC
ELISA antigen
Saliva test
What are small and large strongyles called?
Small = cyathostomins Large = Strongylus spp
Where are small strongyles (Cyathostomins) and large strongyles (Strongylus) found?
Large intestine
Where is Oxyuris equi (pinworm) found?
Large intestine
All horses shed Cyathostomins and it is very common, particularly in which age group?
Young horses
Where is Parascaris equoroum (Ascarid) nematode found?
Small intestine (but NO D+)
Liver
Lung
Do Strongylus spp worms and larvae cause clinical illness?
Worms don’t - larvae more clinically significant
Unless large numbers - anaemia, unthriftiness
Where are Trichodontophorus found?
Large intestine
Do Trichodontophorus worms cause clinical illness?
No - low pathogenicity alone
Do Parascaris equoroum worms cause clinical illness?
Yes but only mechanical blockage due to size
No mucosal damage (hence no D+)
Trichodontophorus worms typically affect younger horses. How do their eggs differ to strongyle eggs?
2X size
Which 2 anthelmintics can be used to treat Anoplocephala perfoliata?
Praziquantel
Double dose pyrantel (adulticide)
What is the only anthelmintic that is effective against migrating Strongylus vulgaris?
Ivermectin
(adulticide)
What is the only anthelmintic effective against hypobiosed larvae in the large intestine?
Moxidectin
(larvicidal)
Where is S. vulgaris found?
Cranial mesenteric artery
Where is S. edentatus found?
Flanks
Hepatic ligament
Name a biting lice of horses
Damalania equi
How is Oxyuris equi diagnoesd?
Perianal eggs
Sellotape test
Which macrocyclic lactone cannot be used in foals <4 months old?
Moxidectin
(Can use ivermectin)
Name this egg
Oxyuris equi
Name this nematode
Parascaris equorum
Name this egg
Parascaris equorum
