Brief reports follow.
Sporadic cases were documented in a Florida man who traveled widely in the month before onset of illness and in residents of El Paso County, Texas, and Bernalillo County, New Mexico. An outbreak of Cx. Two residents of other California counties visited flooded sections of the Colorado River in the 2 weeks before their onsets of illness and also may have been infected there. Five SLE cases occurred among Arizona residents, but exposures of only three were temporally and geographically associated with Colorado River flooding. The increased number of cases among adults may reflect a decline in endemic transmission with age during the past 30 years, resulting in an increase in susceptibility.