Aleutian disease in ferrets, or Aleutian mink disease virus (ADV) , is a parvovirus that can infect mink and ferrets. Aleutian mink are extremely susceptible to ADV and disease is very severe. Ferrets are also susceptible; severity depends on viral strain and the animal’s immunity.

ADV-F is a strain recently isolated from clinically ill ferrets.

Aleutian disease is a chronic systemic immune-mediated disease characterised by wasting and neurological signs. Not all infected ferrets show clinical signs; signs may appear months or years after infection.

Pathophysiology

The virus can spread via direct contact with urine, saliva, blood, faeces, or fomites. Unlike canine and feline parvoviruses, disease follows long-term immune complex deposition rather than direct cytotoxic viral injury. Viral exposure triggers antibody responses and plasma cell proliferation; however the antibody response is not protective. Virus–antibody complex deposition leads to glomerulonephritis, arteritis, and lymphoplasmacytic infiltrates in liver, kidneys, spleen, lymph nodes, gastrointestinal tract, and nervous tissue. Course is usually protracted, lasting 18–24 months.

Ferrets with antibody titres to ADV may shed virus, but the route and duration of shedding are not fully characterised.

Signs of Aleutian disease in ferrets

Animals are suspected of ADV when there is chronic progressive weight loss with nonspecific signs (lethargy, intermittent anorexia) or neurological signs together with hypergammaglobulinaemia.

Neurological signs include pelvic limb paresis that may progress cranially, faecal and/or urinary incontinence, and head tremor.

Melena or overt gastrointestinal bleeding, cough, and dyspnoea may occur.

Physical examination findings:

  • emaciation;
  • pelvic limb paresis, pelvic limb muscle atrophy;
  • head tremor;
  • splenomegaly;
  • enlarged mesenteric lymph nodes;
  • pale mucous membranes in anaemic animals;
  • dehydration.

Differential diagnoses

Chronic wasting:

  • gastrointestinal foreign bodies;
  • Helicobacter infection;
  • infiltrative intestinal disease (eosinophilic gastroenteritis, lymphoplasmacytic enteritis, lymphosarcoma);
  • neoplasia;
  • oestrogen-induced anaemia.

For pelvic limb paresis and tremor:

  • spinal cord disease;
  • insulinoma;
  • heavy metal toxicity;
  • CDV;
  • rabies.

Laboratory changes

A hallmark of ADV is hypergammaglobulinaemia. Gamma globulins often exceed 20% of total protein; hypoalbuminaemia, leukopenia, and/or anaemia may occur.

Elevated cholesterol and creatinine with renal involvement; ALT and AST may rise with liver involvement.

ELISA and PCR are used for diagnosis.

Treatment of Aleutian disease in ferrets

Only symptomatic and supportive care — there is no specific treatment for ADV. Confirmed cases should be isolated. The virus is very stable in the environment; thorough disinfection is needed to limit spread.

Prognosis is poor.

If you are unsure about your pet’s diagnosis and want a second opinion, you can request a veterinary consultation via messengers, phone, or the form on this page.