CAST and infection: There were considerably more transcripts in 129S1/SvImJ, WSB/EiJ, CAST/EiJ, and NOD/ShiLtJ mice on day 4 after PR8 infection than on day 4 after MA15 infection, and significantly more new transcripts in 129S1/SvImJ, WSB/EiJ, and CAST/EiJ mice on day 4 after PR8 infection than on day 2 after PR8 infection.