Pink Eye

The common and highly contagious disease infectious keratoconjunctivitis (pinkeye) can affect cattle at any age causing considerable pain and distress with significant economic losses due to reduced weight gain or weight loss.

How do cattle get infected?

A major predisposing factor in the development of pinkeye is damage to the cornea.  This typically arises due to dust, long grass or plant pollens.  The resulting damage then allows the bacteria, Moraxella Bovis to colonise the irritated area and start to multiply producing the characteristic signs of pink eye.  Flies then feed on the secretions and spread disease from one animal to another.

What do we see?

Typically, affected animals develop a photophobia so they are squinting their eyes, the eyelids are often in spasm and there is a discharge staining the face.  As the disease progresses, an ulcer starts to develop on the centre of the cornea surrounded by a ring of inflammation. The cornea develops oedema which gives it a blue appearance interfering with vision.  In severe cases the cornea can perforate.

Treatment

The cornerstone of treatment involves the administration of antibiotics either directly to the eye or locally.  Antibiotic powders have been used widely in the past but have now fallen into disfavour due to the irritation caused by placing powders in the eye.  Antibiotic eye ointment is a simple and effective means of treating mild to moderate cases.  Early treatment will minimise the risk of permanent scarring to the cornea and reduced weight loss associated with pain.  In more severe cases, the vet may opt for an ‘eye flap’ – temporary surgical closure of the eyelids in addition to medical treatment.

Prevention and Control

Control flies by using products that are licensed for fly control in cattle

Avoid grazing calves on long pasture

Avoid overcrowding

Remove affected animals from the main mob

Treat early

Consider vaccination of healthy animals in known hot spots

Pinkeye in Sheep

Pinkeye is also a very common ailment afflicting sheep and goats however, unlike cattle, the pathogen implicated in disease is a Chlamydia species as opposed to Moraxella.  Outbreaks in NZ are generally mild and occur annually in adult sheep during summer and autumn.   As with the disease in cattle, infection is spread indirectly by dust, pollen in grass and flies which have been contaminated by the secretions of infected sheep.  Handling of the face and head of sheep when drenching may be an important means of spread.  Treatment, if required, generally involves the use of oxytetracycline sprays or ointments.

Covid-19 Update 😷

To our wonderful clients, we are working hard to keep you and our team safe during this current climate. Unfortunately, even with protocols in place, people are still being impacted by this illness and that includes our team. We are managing this the best we can but there are times when we are not fully staffed.

Please be advised there may be longer wait times, days where we cannot offer our full range of services, and changes to our usual hours. Please be patient with us.We may have to reschedule your appointment at short notice as we take care of our staff too. We are sure you will appreciate that we are working exceptionally hard to provide the best care for your pets.

Thank you for your understanding and we will keep you updated as we work through the next few weeks.

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