The
Bg blood group system is actually a system of Human Leukocyte Antigens that
cause confusing results on serological tests of erythrocytes.
We’ve
been having intermittent problems with antibody screening recently; antibody
screens clearly weakly positive but panels were clearly negative; the negative
results then confirmed by NHSBT.
It
transpired that the screening cell in question was Bg(a)+ Bg(b)+. That explains
a lot….
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