Endoparasites + eye diseases Flashcards
What efficacy is drug resistance defined as?
<95%
A sheep presents with weight loss and an acute regenerative anaemia. What is your most likely endoparasite?
Haemonchus cortortus
How is Haemonchus contortus diagnosed?
Famancha test
Using pallor of conjunctiva
What is the sheep tapeworm?
Manezia expansa
How is Manezia expansa, the sheep tapeworm, treated?
Benzimadazoles e.g. fenbendazole
Nematodirus battus affects what age lambs?
6-12 weeks
Around weaning
Nematodirus battus occurs in which season?
Spring (+ Autumn)
Nematodirus is seen with peri-parturient immunosuppression. When does this occur?
2-4 weeks pre-lambing
6-8 weeks post-lambing
What is the primary cause of PGE? What are the secondary causes?
Primary = Teladorsagia circumcincta Secondary = Trichostrongylus, Cooperia
Does PGE tend to affect lambs or adult sheep?
Lambs
What are the two types of Teladorsagia and when do they occur?
Type 1 - lambs in 1st grazing season
Type 2 - yearlings in Winter (due to hypobiotic larvae emerging)
What pathogen is associated with anterior uveitis and feeding bailed silage in ring feeders?
Listeria monocytogenes
How is anterior uveitis (Listeria monocytogenes) treated in sheep?
Subconjuntival oxytetracycline and dexamethasone
Systemic penicillin
Remove source (bailed silage)
What pathogen causes ovine infectious keratoconjunctivitis (pink eye)?
Mycoplasma conjunctivae
Outbreaks of pink eye or ovine infectious keratoconjunctivits are comon. How are they treated?
Isolate affected sheep
Long acting systemic oxytetracycline
Subconjunctival oxytetracycline
