Meningitis is not a specific disease, but instead refers to the pathological condition of inflammation of the tissues surrounding and protecting the brain and spinal cord. The causative agent can be anything that triggers an inflammatory process in a particular dog, including bacteria, virus, fungus, chemical toxins and/or other agents. Meningitis is a very serious condition, and if a dog exhibits signs associated with this disorder it should be taken to a veterinarian immediately. Early diagnosis and treatment can lead to a successful outcome. Without treatment, the prognosis is poor.