Epizootic Catarrhal Enteritis
Ferret enteric coronavirus infection
Also known as: ECE, Green Slime Disease, Ferret Enteric Coronavirus Infection
In short
Ferret enteric coronavirus infection
Also known as: ECE, Green Slime Disease, Ferret Enteric Coronavirus Infection
In short
Epizootic Catarrhal Enteritis (ECE), commonly known as "green slime disease," is a highly contagious viral intestinal infection in ferrets. Caused by Ferret Enteric Coronavirus, it leads to severe diarrhea, vomiting, and rapid dehydration. While young ferrets often recover quickly with supportive care, ECE can be life-threatening for older ferrets or those with pre-existing conditions.

TL;DR. Epizootic Catarrhal Enteritis is a highly contagious viral infection in ferrets that causes severe green watery diarrhea, vomiting, and rapid, life-threatening dehydration.

Early intervention and supportive care are key to helping ferrets recover from ECE.
Epizootic Catarrhal Enteritis (ECE), frequently referred to by ferret owners and veterinarians as "green slime disease," is a highly contagious inflammatory condition of the intestinal tract. The disease is caused by Ferret Enteric Coronavirus (FECV), a virus that specifically targets the cells lining the ferret's gastrointestinal system. Because ferrets are exotic pets with highly specialized anatomies, gastrointestinal diseases can escalate far more rapidly than they do in dogs or cats.
The virus primarily attacks the microscopic, finger-like projections in the small intestine known as villi. These villi are responsible for absorbing nutrients, water, and essential electrolytes from digested food. When FECV infects these cells, the villi become damaged, blunt, and unable to perform their absorptive functions. This results in severe malabsorptive diarrhea, where water and nutrients pass straight through the digestive tract instead of being absorbed into the body.
For ferret owners, this disease is a significant concern due to how quickly it spreads and how rapidly it can compromise a ferret's health. Ferrets have an incredibly short gastrointestinal transit time—often taking only three to four hours for food to travel from the stomach to elimination. Because of this rapid transit, any disruption in intestinal absorption leads to immediate, profound dehydration and metabolic imbalance. In a multi-ferret household, shelter, or rescue facility, ECE can sweep through the entire population within days.
ECE is caused by the Ferret Enteric Coronavirus (FECV). The virus is shed in the feces of infected animals and is transmitted via the fecal-oral route. This means healthy ferrets contract the virus by directly contacting infected feces, sharing contaminated litter boxes, food bowls, or toys, or through caretakers who carry the virus on their hands or clothing.
The classic transmission scenario involves the introduction of a new ferret into an established household. Frequently, this new addition is a young juvenile ferret (a kit). Juvenile ferrets often act as asymptomatic carriers; they harbor and shed the virus in their feces without showing any outward signs of illness. This occurs because the intestinal cells of young ferrets regenerate much faster than those of mature ferrets, allowing them to tolerate the viral infection without developing severe clinical disease. However, when the resident older ferrets are exposed to the newly introduced virus, they quickly develop severe clinical signs.
There are no documented breed predispositions for Epizootic Catarrhal Enteritis. Any domestic ferret, regardless of its coat color, breeding line, or origin, is highly susceptible to infection if exposed to the virus. The primary risk factors are environmental, including high-density housing, poor quarantine protocols for new arrivals, and the stress of rehoming, which can suppress the immune system and make a ferret more vulnerable to active infection.
Recognizing the signs of ECE early is critical to securing a positive outcome for your ferret. The clinical signs typically appear within two to fourteen days following exposure to the virus.

Lethargy and a dull, unkempt coat are common signs of systemic illness and dehydration in ferrets.
Your vet will begin with a thorough physical examination, paying close attention to your ferret's hydration status and abdominal comfort. On palpation, the intestines of a ferret with ECE often feel fluid-filled, thickened, and painful.
To confirm a diagnosis of Ferret Enteric Coronavirus, your vet will recommend specific diagnostic tests:
Because ferrets are prone to other gastrointestinal issues—such as foreign body obstructions, bacterial infections, and inflammatory bowel disease—your vet will also perform baseline bloodwork (a complete blood count and biochemistry profile). This helps rule out concurrent diseases, assess kidney function (which can be compromised by severe dehydration), and monitor blood glucose levels, which is especially critical in ferrets suspected of having concurrent insulinoma.

Fecal RT-PCR is the gold standard diagnostic tool used to detect Ferret Enteric Coronavirus.
There is no specific antiviral medication that cures ECE. Instead, treatment focuses on aggressive supportive care to keep the ferret hydrated, manage pain, and control secondary complications while the intestinal lining heals.
Fluid therapy is the most critical component of ECE treatment. Depending on the severity of the dehydration, your vet will administer fluids either subcutaneously (under the skin) or intravenously via an indwelling catheter. These fluids restore hydration, correct electrolyte imbalances, and maintain blood pressure.
Because affected ferrets refuse to eat, assisted feeding is essential. Your vet will recommend a highly digestible, high-calorie liquid or semi-liquid recovery diet designed for carnivores. This food must be syringe-fed gently multiple times a day to prevent hepatic lipidosis (fatty liver disease), a life-threatening condition that occurs when a ferret's body goes into starvation mode.
The prognosis for ferrets with ECE varies significantly based on their age and overall health status:
Some recovered ferrets may experience chronic malabsorption or intermittent soft stools for several weeks or months after the initial infection. These individuals may require long-term dietary management, such as highly digestible diets, to maintain their weight and gastrointestinal health.
Preventing ECE relies entirely on strict biosecurity and quarantine protocols, as there is currently no vaccine available for Ferret Enteric Coronavirus.
Because ferrets are small mammals with rapid metabolisms, they can deteriorate from stable to critical in a matter of hours. You should contact your veterinarian immediately if you notice any changes in your ferret's stool or behavior.
Seek emergency veterinary care immediately if your ferret exhibits any of the following red-flag signs:
Because specific textbook citations were not provided for this record, the clinical guidelines outlined in this article are based on standard-of-care veterinary consensus for exotic animal medicine and ferret-specific gastroenterology.
Treatment must be prescribed by a licensed veterinarian based on your pet. Specific drug doses are intentionally not shown here.
Epizootic Catarrhal Enteritis (ECE), commonly known as "green slime disease," is a highly contagious viral intestinal infection in ferrets. Caused by Ferret Enteric Coronavirus, it leads to severe diarrhea, vomiting, and rapid dehydration. While young ferrets often recover quickly with supportive care, ECE can be life-threatening for older ferrets or those with pre-existing conditions.
Green watery diarrhea、Anorexia、Dehydration、Lethargy、Vomiting、Weight loss、Melena
Fecal RT-PCR for Ferret Enteric Coronavirus、Fecal electron microscopy、Histopathology of intestinal biopsy
Treatment must be prescribed by a licensed veterinarian based on your pet. Specific drug doses are intentionally not shown here.
This article is for general education and is not a substitute for professional veterinary advice. If your pet is unwell, please consult a veterinarian.
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