Volume 18, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



and members of the complex are important vectors of St. Louis encephalitis virus (SLE). In the western part of the United States where is the primary vector, long-term observations have included nonepidemic as well as sporadic epidemic years. Before the present report and in regions where complex is the vector, studies were limited to outbreaks of encephalitis. This paper is based on field and laboratory studies that were focused on rural McLeansboro, Illinois, during 1964–1967 and on the metropolitan area of St. Louis, Missouri, during 1966–1967. In each of the years, SLE virus was isolated from pools of complex collected in both areas. At less frequent intervals, the virus was encountered in specimens from birds. Sparse rainfall and periods of sustained high temperatures were related to the SLE virus activity in mosquitoes. Although virus was regularly detected, overt disease in man was limited to 1964 in McLeansboro and to 1966 in St. Louis. Nevertheless, the potential threat of epidemics exist. This threat could be reduced through elimination of sites of mosquito-breeding by the installation of adequate treatment and transport systems for sewage.


Article metrics loading...

The graphs shown below represent data from March 2017
Loading full text...

Full text loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error