Feline Conjunctivitis: Causes, Symptoms & Treatment Guide

Conjunctivitis in cats, often called “pink eye,” refers to inflammation of the conjunctiva, the moist tissue lining the eyelids and covering the front of the eye. This condition can affect one or both eyes, causing redness, swelling, discomfort, and sometimes pain. Cats may produce a mucky discharge from the affected eye ranging from clear and runny to sticky and yellowish, which causes irritation.

Because conjunctivitis can be contagious, especially viral forms, it’s important for pet owners to recognise symptoms early and seek veterinary care. Maine Coon kittens and other cats living in multi-cat households are at particular risk if exposure occurs.

What is Feline Conjunctivitis?

Feline conjunctivitis is an inflammation of the conjunctival membranes, the transparent mucous tissue that covers the eyeball and lines the inside of the eyelids. The condition is commonly viral but can also be bacterial or due to allergic reactions or irritants.

Common infectious causes include:

• Viruses: The most frequent cause is feline herpesvirus type-1 (FHV-1), which can lead to recurrent episodes.
• Bacteria: Agents like Chlamydophila felis, Mycoplasma, Streptococci, and Staphylococci can cause or complicate conjunctivitis.

Non-infectious causes such as allergies, dust, foreign bodies, or irritants may also trigger conjunctivitis signs.

Recognising the Symptoms of Conjunctivitis in Cats

Pet owners often notice the following signs early:

• Reddened or swollen eyes, sometimes with visible irritation
• Squinting or excessive blinking
• Discharge from the eyes: clear and watery, thick and sticky, or yellow/green if infected
• Eyes may appear watery or fluid may build up
• Secondary respiratory infections may accompany eye symptoms

Conjunctivitis can start in only one eye but tends to spread quickly to both if untreated. Additionally, cats suffering from respiratory illnesses like feline influenza may develop conjunctivitis due to compromised immune defences.

How is Conjunctivitis Contracted and Spread?

Contagious forms of conjunctivitis, especially those caused by FHV-1 or bacterial agents, spread easily between cats through direct contact or shared items such as bedding, food bowls, or grooming tools.

Multi-cat environments and unvaccinated cats face a higher risk. A weakened immune system can make cats more susceptible to the infections that cause conjunctivitis.

Other causes include irritation from foreign bodies or allergens, making prevention more complex but still manageable.

Treating Your Cat’s Conjunctivitis

Prompt veterinary treatment is important to alleviate discomfort, control infection and reduce contagious spread.

Common treatment approaches include:

• Topical antibiotics: Eye drops or ointments are applied multiple times daily to treat bacterial infections.
• Antiviral medications: Used chiefly for herpesvirus-related conjunctivitis cases to reduce viral activity.
• Anti-inflammatory drugs: To reduce redness, swelling and discomfort.
• Oral antibiotics: Prescribed if topical treatments alone are insufficient, or if systemic infection is present.

In cases caused by allergies, identifying and avoiding allergens can lead to full resolution without antibiotics. Rarely, if tear ducts are blocked or damaged, surgery may be necessary.

It is crucial to follow your vet’s advice closely and complete the full course of any prescribed medication even if symptoms improve early.

Preventing Feline Conjunctivitis

While conjunctivitis is common, taking proactive steps can lower risks:

• Ensure cats are vaccinated against feline herpesvirus and other contagious diseases to boost immunity.
• Maintain good hygiene, especially in multi-cat homes, by regularly cleaning bedding, food dishes and litter trays.
• Isolate affected cats until they have fully recovered to prevent spreading.
• Reduce allergy triggers in your cat’s environment such as smoke, strong perfumes and certain foods.

Early detection and responsible management help protect your cat’s eye health and comfort. If you suspect symptoms of conjunctivitis in your cat, contact your veterinary surgeon promptly for diagnosis and suitable treatment.