The Basics-Background-Therapies with updates added 2019. Autism spectrum disorders, or ASD, are also called pervasive developmental disorders (PDD) because they involve delay in many areas of development. PDD or ASD is a category that includes five different disorders of development, each with differing severities and patterns: Autistic Disorder. All Autism has activated Retroviral activity. Lyme can cause cardiomyopathy, CHF,...