Antibiotics improve autistic child's symptoms, validating the autism-gut microbe connection - http://www.naturalnews.com/049813_autism_gut_microbiome_antibiotics.html
And aside - many so-called genetic conditions may not be so, because it is being found that genetics are more pliable than previously thought, (which I have always believed). The body has an amazing ability to right itself - were it not for other invasive life forms contesting for resources, and manipulating chemical and consciousness dynamics.