A mixed epidemic associated with echovirus types 6 and 11: virologic, clinical and epidemiologic studies.

During 1979, an outbreak of mixed enterovirus infections occurred in Kansas City and adjacent communities. Sixty-six enteroviruses and 7 adenoviruses were recovered from 73 persons in a survey hospital population. Twenty-eight persons yielded echovirus type 11, 22, echovirus type 6, and 16 either echovirus type 9 or Coxsackieviruses group B, types 2 and 3. This study describes some of the clinical, virologic and epidemiologic characteristics of the outbreak. A major finding relates to the recovery of enteroviruses from cerebrospinal fluids with essentially normal leukocyte counts.