Bovine eyes

Question 1

Primary diseases

Answer 1

Infectious bovine kerato-conjunctivitis (Pinkeye)
Bovine iritis (silage eye)
SCC

Question 2

Infectious bovine kerato-conjunctivitis

Answer 2

Morexella bovis
CS - lachrymation, blephar, ulcer, vascularisation
Early keratitis - white spot (cornea)
Tx - LA ointment (cloxacillin)
suture 3rd eyelids & eyelids
Photophobia
RF - flies, woods, dust
PrV - Fly control (pour on)

Question 3

Bovine iritis

Answer 3

Ass - big bale silage feeding (Winter)
CS - early - Constricted pupil
corneal opacity, glaucoma
vascularisation (inside cornea)
Dx: -ve Fluoro
Pth - Uveitis
Tx - Ab + Sub-Conj atropine & Dexa

Question 4

SCC

Answer 4

Breed - older Hereford (^ UV exp)
Invasive - Cornea, 3rd, Conjunctiva
Sx removal

Question 5

Enucleation

Answer 5

Care when handling
Same as smallies
Retrobulbar/ Peterson block

Question 6

Foreign bodies

Answer 6

Grass seeds
Lead to keratitis

Question 7

Malignant catarrhal fever

Answer 7

Ass - sheep (OHV2)/ wildebeast
Isolated cases, fatal
Dx - ELISA
CS - Persistent >41°C, encephalitis
LN enlarged, D+
Eyes - conj.itis, eyelid oedema,
centripetal opacity (cornea)
DDx
Blue tongue - no D+, sheep worst affected

Question 8

BHV1
Infectious bovine rhinotracheitis

Answer 8

Latency (trigeminal)
Recrudescence (stress)
Dx - ELISA, PCR
Vax
Cs - >41°C, oedema, serous discharge, big milk drop

Question 9

Listeriosis

Answer 9

Dz V. CNV/ VII to brain
CS- encephalitis, unilateral paralysis
menace retraction
Tx - Oxytet

Question 10

Generic dz with eye lesions

Answer 10

BVD cataracts (Dz 75d-150d preg)
Septicaemia - hypopyon
Endotox - injected conjunctiva

Question 11

Blindness

Answer 11

CCN
Pb poisoning
HypoVit A
Twin lambs

Question 12

CCN

Answer 12

Thiamine (B1) Deficiency
Young
Thiaminase produced in rumen
Dx - PME, fluorescent brain (UV)
Cs - -ve menace, +PLR, nystagmus, star gazing, opistothonus
Tx - Thiamine and diet change