Parasitic Gut Diseases IV (Horses) Flashcards
What is a cyathostomin?
a type of strongyle
- Commonest parasite
- with 51 different species
What is the connection between cyathostomins and the gut wall?
Some of the infective larvae that sit in the lumen of the gut burrow into the gut wall and undergo a stage of arrested development
they can then ‘burst’ out the gut wall into the lumen and carry on development
What are the key facts about cyathostomin mucousal larvae
- they sit in the submucosa of the caecum and the colon
- larval chilling and trickle infection slow development to maturity
- they can be 95% of the burden
- they are resistant to antithelmintic treatments
- difficult to diagnose
When do the cyathostomine larvae mature?
late winter/ spring
What are the important epidemiological features of cyathostomins?
- Widespread development of anthelmintic resistance
- High level of infection intensity in horses
- Young animasl (under 4) are the most at risk
What is the clinical relevance of cyathostomins?
- Sudden onset diarrhoea and weight loss
- oedema
- colic
How can you diagnose cyathostomins?
Its difficult due to non-patent infection
small redworm blood test can evaulate the probability of a significant total worm burden
What is the pathogenesis for strongylus vulgaris
- Uncommon
- Highly susceptible to antithelmintics
- large numbers are associated with aneamia
- larval migration is associated with colic
How long is an adult anoplocephala perfoliata?
The adults are around 5-8cm long
(segmented and they live in the caecum)
Where do most tapeworm related diosrders occur in the GIT?
ileoceacal junction
What do Parascaris equorum look like?
Spaghetti-Like
In what horse age are parascorum equorum seen in?
Young horses (under four)
What is notifiable about parascorum equorum?
- Prolific egg production
- Hardy eggs, survive in the environment
- Resistant to ivermectin
What do pinworms cause?
Minor perineal irritation
What is the most common strongyle in horses?
Cyathostomin
