From Jackson Labs: NOR/LtJ mice are insulitis resistant and diabetes free. NOR/LtJ mice still exhibit peripheral T-lymphocyte accumulation and defective peritoneal macrophage responses characteristic of NOD/ShiLtJ mice (Stock No. 001976). NOR/LtJ mice are matched at the diabetogenic H2g7 complex to NOD/ShiLtJ. In addition to serving as controls to the NOD/ShiLtJ strain, these mice are useful in studies of hearing loss.