Viral infections and demyelinating diseases.

Adolescent Adult Animals Child Child, Preschool Demyelinating Diseases/etiology Distemper/etiology Distemper Virus, Canine Dogs Encephalomyelitis/etiology Encephalomyelitis, Autoimmune, Experimental/immunology Hepatitis, Animal/etiology Humans Leukoencephalopathy, Progressive Multifocal/etiology,microbiology Measles/complications Mice Multiple Sclerosis/etiology Murine hepatitis virus Myelin Sheath Orthomyxoviridae Infections Papillomaviridae/isolation & purification Polyomaviridae RNA Viruses Rodent Diseases/etiology Scrapie/etiology Sheep Simian virus 40/isolation & purification Subacute Sclerosing Panencephalitis/etiology Virus Diseases