Almost all of the healthy adult serum have anti-T antibody,so I wonder how can we transfuse a T-polyagglutination patient.

And what kind of anti-T antibody in adult's erum ,IgM and/or IgG?

Nowadays we all use monoclonal anti-A and anti-B reagent which can't detect the T-active, maybe some patient have been given plasma or some component have plasma, especially for the HUS children.

Is there some standard about this question ?

here's a link to the California Blood Bank Society where they addressed this topic http://www.cbbsweb.org/enf/2004/ffp_lowtiter_anti_t.html