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.
These medical comorbidities or autism symptoms: Many of these medical conditions are present in infancy, long before communication and cognitive dysfunctions are recognized. Currently, autism can be diagnosed as early as two years of age, however, the average diagnosis is 4.5 years. If comorbid conditions are identified, vulnerable children could potentially be recognized even earlier. Medical comorbidities often appear in clusters with neurological symptoms of delay.