ECHO 11 Virus Associated with Aseptic Meningitis.

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Abstract
In a study of an outbreak of aseptic meningitis, ECHO 11 was the most prevalent virus isolated (24 of 52 isolations). Other entero-viruses associated with cases in the outbreak but to a lesser degree were ECHO 4 and polioviruses 1 and 3. Children over 5 years of age infected with ECHO 11 were more apt to have clinical symptoms of aseptic meningitis than younger children.