Is autism increasng or decreasing?
Increasing. There are a lot more cases of autism around now than there were 10 years ago.
Basicly, autism is something you are born to have, not something that you could grow into. So, adult autism, means that a child with autism grows up and become an adult with autism. However, if you didn't find out that you have autism until you are an adult, then your autism must be the mild kind on the entire autism spectrum.
It is unlikely that your child would have autism. There is a genetic component to autism, so it is more likely that you would have a child with autism than a couple with no history of autism in their backgrounds. However, it is still more likely that your child will not have autism than have autism.
Yes, there are known situations of persons with autism having children with autism. There is a genetic component to autism. Some people with autism get married and have children. Some of those children have autism, but some do not. Autism varies in its severity, so other people might not recognize that a person has autism. Sometimes a parent with autism or Asperger's Syndrome is not diagnosed until after having a child with a more severe…
Autism only affects the person with Autism - injustice can effect the family as a whole if they cannot get easy access to Autism services, but Autism doesn't affect relationships of the Autistic persons parents. This is a classic tactic of Autism Speaks, they tell people that Autism ruins families and relationships in order to frame Autism as something terrible so that people give them more money - please don't listen to anti-Autism rhetoric from…
Asperger is different from autism because people with Aspergers are less restricted with behavioral interactions than those with autism. Asperger's is a form of autism, but it is high-functioning and Aspergers is not as severe as actual autism is (Take it from me: I have aspergers and my younger brother has autism)
While all direct causes for autism are not completely known, there are some studies that indicate that parent with particular autism or autism-like symptomology can contibute to the likelihood that autism will surface in their children, thus establish a possible link to inheritability of autism or autism spectrum disorders. There are links to reelin gene mutations that also give rise to autism as well. So, the answer is, yes, it can be inherited.
Autism isn't a disease or a virus, thus there are no strains of autism. Autism is just autism, it was previously split up into Autism Spectrum Disorder (Classic Autism), Asperger Syndrome, Pervasive Developmental Disorder Not Otherwise Specified (PDD-NOS), childhood disintegrative disorder, and Rett Syndrome - now all are merged under the Autism Spectrum Disorder diagnosis.