This may relate to the inflamed liver or other internal organs
How is it spread?
It is transmitted by direct contact with infected urine, saliva and faeces. Furthermore, dogs that have recovered from this disease can still be infectious to other dogs for more than six months. Young puppies are particularly susceptible to the disease. The virus is relatively hardy and can survive for months in the environment under ideal conditions.
Prevention and Control
The best form of protection against this virus is through vaccination.
Some vaccines offer a duration of immunity of three years, this means your dog will have immunity for a full three years.