Lyme disease is caused by a spirochete, Borrelia burgdorferi. A spirochete is a type of bacterium. Lyme disease is transmitted to dogs through the bite of a tick. Once in the blood stream, the Lyme disease organism is carried to many parts of the body and is likely to localize in joints.
encephalopathy is a general term describing a disease that affects the function or structure of your brain there are many types of encephalopathy and brain disease some types are permanent and some are temporary
Encephalopathy is a difficult term because it can be used to denote either a disease or finding (i.e., an observable sign in a patient). When referring to a finding, encephalopathy refers to permanent (or degenerative) brain injury, or a reversible one. It can be due to direct injury to the brain, or illness remote from the brain.