O - Infectious keratoconjunctivitis - pink eye

Question 1

Aetiology

Answer 1

• Associated with Mycoplasma conjunctivae
• Also, Chlamydophila psitacci

Question 2

Epidemiology

Answer 2

• 87 % of UK Sheep farmers reported eye disease (2019)
• Close contact spread- direct contact
• Adverse weather conditions

Question 3

Pathogenesis

Answer 3

• Initial ocular signs
  ◦ Epiphora
  ◦ Conjunctival hyperemia
  ◦ Chemosis (swelling conjunctiva)
• As the infection progresses:
  ◦ Ocular discharge muco-purulent
  ◦ Inflammation spreads from the sclera to the cornea.
  ◦ Corneal neovascularisation
  ◦ Corneal ulceration

Question 4

Clinical presentation

Answer 4

• Ocular discomfort and discharge
• Marked conjunctivitis
• Cloudy ocular surface
• Corneal ulceration
• Temporary blindness

Question 5

Diagnosis

Answer 5

• Swab (Mycoplasma media ) - Culture & PCR

Question 6

Treatment

Answer 6

• Sub-conjunctival antibiotic
• Management changes

Question 7

Prevention

Answer 7

• Provide shelter outdoors
• Provide adequate trough space
• Quarantine new animals