Patients with neurodegenerative and behavioral disorders often have systemic bacterial,viral and /or fungal infections that may play important roles in their pathogenesis. We and others have examined patients with various neurodegenerative and behavioral neurological conditions,such as Amyotrophic Lateral Sclerosis(ALS),Multiple Sclerosis(MS)and Autistic Spectrum Disorders(Autism,Attention Deficit Disorder,Asperger Syndrome)