ARBOVIRUS SURVEILLANCE IN IOWA, USA, DURING THE FLOOD OF 1993

During the summer of 1993, mosquitoes were collected by dry ice-baited CDC light traps from July through September in 12 different cities in Iowa. In all, 169,907 mosquitoes belonging to 17 different species we re collected. A total of 2,013 pools were processed for arbovirus isol ation, from which 59 arbovirus isolates were obtained: 41 Flanders (FL A), 16 trivittatus (TVT), one Cache Valley (CV), and one Turlock (TUR) . Supplementary sentinel chicken and human data are also included. In spite of the increase in larval habitats and elevated mosquito populat ions, there was not an increase in virus transmission.