Myxomatosis: What It Is and How to Protect Your Rabbit

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Myxomatosis: What It Is and How to Protect Your Rabbit

Myxomatosis is a severe viral disease of rabbits, spread mainly by biting insects like mosquitoes and fleas. It causes swelling around the eyes, nose, mouth and genitals and is very often fatal. There is no reliable cure, so prevention through insect control and vaccination (where available) is essential. Any facial swelling in a rabbit is an emergency.

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What myxomatosis is

The disease is caused by the myxoma virus. It does not usually spread by direct rabbit-to-rabbit contact alone; instead, biting insects act as the main couriers, carrying the virus from infected wild or pet rabbits to yours. Because insects do the work, even a rabbit that never meets another rabbit can be infected.

The illness is distressing. Classic signs are puffy, swollen eyelids that can seal the eyes shut, swelling of the lips, ears and genital area, thick discharge from the eyes and nose, fever, and loss of appetite. Affected rabbits become very unwell quickly.

How it spreads and why climate matters

Because biting insects are the main route, myxomatosis risk rises when insects are active. In the warm, humid climates of Hong Kong and Taiwan, mosquitoes can be present for much of the year, and typhoon-season standing water gives them breeding sites. That means the insect-borne risk is not limited to a short summer as it might be in cooler countries , vigilance often needs to be year-round.

Insect screens are a simple, effective barrier against the biting insects that spread myxomatosis.

Early signs to catch

Catching it early gives the best, though still limited, chance. Check your rabbit's face daily and look for: puffiness around the eyes or a runny, gummy eye; swollen lips or ears; swelling around the bottom or genitals; and any sudden drop in appetite or energy. Because these signs can be subtle at first, a habit of gentle daily face checks helps you notice change fast.

Early myxomatosis often shows as puffy eyelids, lips or ears , check your rabbit's face regularly.

Prevention that works

You cannot always stop an insect bite, but you can stack the odds in your favour:

• Fit fine insect screens on windows and over enclosures, especially relevant in high-rise flats where windows are opened for ventilation.
• Use mosquito control appropriate for a home with pets, and remove standing water where mosquitoes breed.
• Keep your rabbit's environment clean to avoid attracting flies, and control fleas with vet-approved products only.
• Ask your vet about vaccination. A combined vaccine covering myxomatosis and RHDV is available in some regions; availability varies between Hong Kong, Taiwan and elsewhere, so confirm what your local clinic can offer.

If your rabbit is diagnosed

Treatment is supportive , pain relief, keeping the rabbit eating and hydrated, and intensive nursing , but outcomes are frequently poor, and your vet may discuss quality of life honestly with you. This is heart-breaking, which is exactly why prevention is emphasised so strongly for this disease.

Living context by region

This guide is written for multi-region English readers (US/UK/AU/NZ/CA/EU and more). Where climate, products, or vet access differ, prefer local veterinary advice and local product labels. Use metric first; keep °F/lb in mind for North American homes.

When to call your vet

• Signs are getting worse over hours, not better

• Pain, persistent vomiting/diarrhea, or neurological signs

• You needed force or guesswork to keep going at home

Common mistakes

• Waiting because the animal 'still looks okay' while prey species hide pain

• Changing five variables at once so you cannot tell what helped

• Copying drug doses from social media

• Skipping species-appropriate husbandry while buying more gadgets

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