Pinkeye (Infectious Bovine Keratoconjunctivitis) in Cattle
Pinkeye is a painful and highly contagious eye disease of cattle. This guide covers welfare impacts, treatment, and prevention.
Key Facts
Pinkeye is caused primarily by Moraxella bovis bacteria
Face flies transmit the bacteria between cattle during summer
Signs include excessive tearing, eye closure, and corneal ulceration
Severe cases cause corneal perforation and permanent blindness
Welfare impact is significant — affected cattle are in pain and have reduced vision
Treatment with antibiotics (oxytetracycline) is effective when given early
Welfare Considerations and Management
Welfare-centred management of pinkeye requires early identification and prompt treatment. Affected cattle should be moved to shade as sunlight causes significant discomfort. Antibiotic treatment (oxytetracycline injection or eye ointment) reduces bacterial burden and speeds healing. Eye patches protect from sunlight and flies. Isolation reduces spread. Face fly control during summer reduces disease incidence. Vaccination provides some protection in high-prevalence situations.
What You Can Do
Move affected cattle to shade immediately to reduce light-induced pain
Treat affected animals promptly with appropriate antibiotics under veterinary direction
Control face flies to reduce spread during summer months
Vaccinate in herds with repeated outbreaks as part of an integrated control programme