The consensus that Autism is from an intrauterine infection has been growing, bolstered by Patterson's and Fatemi's studies. However, the question remains: which infection? In this review, a prime, conceivable candidate is presented, supported by scientific literature, old and new. Until 1980 autism is still called "childhood schizophrenia" and in some parts of the world, it still is. But there is an extensive body of literature which ties schizophrenia to the infectious focus of this paper. This was only brought more sharply into focus when Rzhetsky, in 2007, used a proof-of-concept biostatistical analysis of 1.5 million patient records, finding significant genetic overlap in humans with autism, schizophrenia........and tuberculosis. And in March of 2017, Ahmedabad-based Dr. Ketan Patel, who has more than 20 years' experience in treating and researching autism in children, said that as many as 45% of the autistic children in the world are found, upon proper scrutiny, to have a history of tuberculosis on either their family's maternal or paternal side. Ever since Nadya Markova's study, also in 2017, it can no longer be questioned that the all too common Cell-Wall-Deficient [CWD] forms of mycobacteria such as TB can easily penetrate the umbilical cord and infect the fetus from the maternal blood stream, even in the case of seemingly normal healthy deliveries. Tracing the history of autism from John Langdon Down's children, a subset of which were autistic, to the present, this paper also explains how these stealth pathogen hypothesized to be behind Autism have evaded modern diagnostics.
