FIG 5.

NMII induces cell death in peritoneal B1a B cells. Peritoneal B cells were purified by MACS and infected with NMII. At day 3 postinfection, cells were stained by use of the TUNEL reaction and with antibodies against NMII and CD5. This figure shows CD5⁺ B1a cells that are TUNEL positive and that colocalize with NMII (white arrows). These data indicate that NMII induces cell death in peritoneal B1a B cells.