Pathogenic E. coli strains use a multi-step scheme of pathogenesis that is similar to that used by other mucosal pathogens, which consists of colonization of a mucosal site, evasion of host defences, multiplication and host damage.
Research suggests that autism can be reliably diagnosed by age 2, but this study found that fewer than half of children with autism are diagnosed by age 5. Autism is a complex neurodevelopmental disorder that affects as many as 1 in 88 U.S. children, according to the U.S. Centers for Disease Control and Prevention.
Autism Speaks and other autism organizations are working hard to raise awareness of early signs among physicians as well as parents. From birth to at least 36 months of age, every child should be screened for developmental milestones during routine well visits. When such a screeningâor a parentâraises concerns about a child's development, the doctor should refer the child to a specialist in developmental evaluation and early intervention.