We have 2 echos for our primary testing. As well, we use Gel, PEG and SIAT for secondary methods. We get samples referred to us from other hospitals who almost exclusively use Gel. We notice that the referring hospitals have pos screens by gel and that we identify various antibodies by gel (E, K, S) that are either completely missed by Echo (Neg screen/ Neg panel) or only found on the Echo by panel testing (Neg screen/pos panel). I have brought examples of these to Immucor tech support and they did not really give me a good reason as to why this is happening. Will continue to bring examples to them to see if they continue to give me the same responses.