Outbreak of Illness Associated with E.C.H.O. Type 7 Virus

Abstract
Evidence of ECHO type 7 virus infection was demonstrated in 19 individuals in the north-east region of Scotland in 1961. 10 patients showed the clinical picture of aseptic meningitis; ECHO type 7 virus was isolated from the cerebrospinal fluid in 3, and in all of them antibody studies suggested concurrent infection. Neutralizing antibody tests showed antigenic differences between the outbreak strains and the prototype strain, but no differences were apparent when the haemagglutination-inhibition tests were used.