Epizootic Catarrhal Enteritis: The Green Slime Disease

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Epizootic Catarrhal Enteritis: The Green Slime Disease

Epizootic catarrhal enteritis (ECE) is a contagious viral disease of the ferret gut, famous for bright green, mucousy diarrhoea, which is why it is called green slime disease. It spreads rapidly between ferrets by contact. It can be serious, especially in older or weak ferrets, so any ferret with green diarrhoea, that stops eating, or that is losing weight needs a ferret-savvy vet.

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What ECE is

ECE is caused by a coronavirus that infects the lining of the ferret's small intestine, damaging the cells that absorb nutrients. This leads to profuse diarrhoea and poor nutrient absorption. Newly introduced ferrets, especially from shelters or shows, often bring the virus in, and it can sweep through a household. Adult ferrets exposed for the first time tend to be hit hardest, while some carriers show few signs yet still infect others.

Signs to watch for

The hallmark is sudden bright green, slimy, mucous-coated diarrhoea, sometimes with visible grainy or seedy material from undigested food. Affected ferrets may vomit, go off their food, become lethargic, and lose weight quickly. Because the damaged gut cannot absorb food well, dehydration and weight loss are the biggest dangers, particularly in older ferrets.

Why you must not wait

A ferret that stops eating can decline within hours, and ongoing diarrhoea quickly causes dehydration. ECE itself can also resemble other serious problems, including a gut blockage, which is an emergency. Because you cannot tell these apart at home, green diarrhoea or a ferret that will not eat always warrants a prompt vet visit rather than watching and waiting.

How vets help recovery

There is no instant cure for the virus, so care is supportive while the gut heals. A vet may give fluids for dehydration, medicines to protect the gut and control secondary infection, and crucially a plan for frequent feeding of an easily digested, soupy meat-based recovery diet. Keeping calories going in is often the difference between recovery and decline. Many ferrets recover with good nursing, though some older ferrets have lingering digestive trouble.

During recovery, ferrets often need frequent soupy meat-based feeds to prevent dangerous weight loss.

Protecting your other ferrets

ECE spreads easily on hands, bedding, bowls and shared spaces. Isolate any sick or newly arrived ferret, ideally in a separate room, and always handle healthy ferrets first, then the sick one. Wash hands thoroughly and change or wash clothing between them. Disinfect bowls, litter trays and surfaces, and launder bedding on a hot wash. Quarantine any new ferret for a couple of weeks before introductions.

ECE spreads by contact; quarantine new ferrets and wash hands to protect your resident ferrets.

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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