Journal of Toxicology and Environmental Health, Part A, 70: 837851, 2007
Copyright Taylor & Francis Group, LLC
ISSN: 1528-7394 print / 1087-2620 online
DOI: 10.1080/15287390701212141
UTEH A Case Series of Children with Apparent Mercury Toxic
Encephalopathies Manifesting with Clinical Symptoms of
Regressive Autistic Disorders
Autistic Disorders David A. Geier
Institute of Chronic Illnesses, Inc., Silver Spring, Maryland, USA
Mark R. Geier
Genetic Centers of America, Silver Spring, Maryland, USA

This study examines the cases of nine
pediatric patients with neurodevelopmental disorders who presented
to the Genetic Centers of America from June 2005 through
February 2006 for outpatient genetic/developmental evaluations.

Eight of nine children examined in this study (a) had regressive
autistic disorders, (b) had elevated levels of androgens, (c)
excreted significant amounts of mercury post chelation challenge,
(d) had biochemical evidence of decreased function in
their glutathione pathways, (e) had no known significant mercury
exposure except from Thimerosal in their vaccines/
Rho(D)-immune globulin preparations, and (f) had extensive
alternate causes for their regressive ASDs ruled out.
It is clear from these data, and other emerging data that have
been recently published, that additional autistic disorder
research should be undertaken in the context of evaluating
mercury-associated exposures, especially from Thimerosalcontaining
vaccines. Additionally, studies should also be
undertaken to evaluate other databases/registries of patients to
assess the compatibility of the present results with clinical
observations for other children with autistic disorders. In light
of the results of this present case series examining mercury
exposure and its consistency with previous controlled studies
of autistic children, the mercury factor should be considered in
the differential diagnosis factors of regressive autistic disorders
in children.