Disease Due to Echo Virus Type 9 in Massachusetts, 1958

Abstract
IN January, 1958, 2 siblings from Jamaica Plain and A their cousin from Roxbury, both in the Boston area, were admitted to the Children's Medical Center, Boston, with a tentative diagnosis of meningococcus meningitis. All 3 children had, in addition to a pleocytosis, a petechial or a discrete maculopapular rash with petechial elements on the face and neck or chest. The etiologic agent in each case was identified by Dr. Thomas E. Frothingham of this laboratory as ECHO virus Type 9. A report of these cases appears elsewhere in this issue of the Journal. The presence of this agent in . . .