Tissue distribution of La Crosse virus following intraperitoneal (IP) inoculation of Swiss Webster mice with 104.5 PFU. aPercent of mice positive by plaque assay represented by shading: 100% black, 66% dark gray, 33% light gray, 0% no data entry. Mean virus titer calculated only for virus positive tissues. Areas left blank indicate virus titer below detection limit of 0.7 log10 PFU/tissue. bTissue samples collected from one moribund mouse.