Bovine Flashcards
What pathogen causes IBK?
Moraxella bovis +/- mycoplasma
What transmits IBK?
Vectors - flies
What are the main clinical signs of IBK?
Lacrymation Blepharospasm Red eye Keratitis - progressive ulceration Pannus
What pathogen/ pathogenesis may be associated with silage eye?
Listeria/ hypersensitivity
Which breed is associated with SCC of the eye?
Hereford
What pathogen is associated with malignant catarrhal fever?
OvHV-2
What clinical signs are associated with MCF?
Pyrexia Depression Nasal and mouth ulcers Conjunctivitis/ oedema/ blepharospasm Resp and GI signs
What pathogen is associated with IBR?
BoHV-1
What clinical signs are associated with IBR?
Pyrexia
Conjunctivitis
Nasal discharge/ resp signs
Corneal oedema
What clinical signs are associated with listeriosis?
Cranial nerve 5 and 7 damage
1) facial nerve paralysis, ear droop
2) Reduced menace response
3) Also encephalitis - circling & depression
What therapies can be used to treat listeriosis?
Oxytetracycline or penicillin
What ocular lesions are associated with BVD?
Congenital cataracts
What ocular lesions may be associated with sepsis?
Hypopyon/ petechiae
What ocular lesions are associated with endotoxaemia
Petechial/ chemosis
What ocular signs are associated with dehydration?
Sunken eyes
What ocular lesions are associated with bracken poisoning?
Hyphaema
What mineral deficiency is associated with neurological deficits - nystagmus, convulsions and opitothonus?
Thiamine - CCN
What mineral deficiency is associated with night blindness?
Vitamin A - retinol
What treatment/ preventative measures can be used against IBK?
Moraxella is a gram-ve bacteria:
1) Systemic antibiotics - Macrolides, oxytetracycline and florfenicol.
2) Ointment - cloxacillin
3) Prevention - Isolation of affected animals
When is IBK most commonly seen?
Summer. autumn - due to increased numbers of fly vectors. Increased dust causing irritation of the cornea.
How does Moraxella cause damage to the cornea?
Releases beta-haemolysins which degrade corneal epithelium.
Pink eye
Moraxella bovis - IBK
Blue eye
MCF - corneal oedema
Which opthalmic virus can recrudesce with stress and cause abortions?
IBR - BoHV-1
