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Helminthic infections and allergic disorders including asthma, rhinitis and eczema are major public health problems. While helminthic infections are prevalent mainly in developing countries, allergic disorders are more common in developed industrialized ones. This has lead to the assumption that helminth infections protect against allergy. Studies in experimental animals have shown that infections with some helminths or immunization with helminth derived products suppress the development of allergic diseases. The suppressive effect of helminths has been attributed to the induction of...

Autistic spectrum disorder (ASD) is a set of neurodevelopmental disorders that cover the lifespan. It occurs earlier than the other disorders in this group and is evident before the age of three years. This disorder involves three areas of abnormality; impaired social interaction (failure to develop peer relationship, no eye contact or other nonverbal interactive behaviors, no seeking to share enjoyment with others, or lack of social responses), impaired communication (delay or lack of language, stereotyped language, repetition of words said by others, or lack of imaginative play), and...