Section 4.4
Testing for Antibodies

A patient has the Lewis phenotype Le(a−b−). An antibody panel reveals the presence of anti-Le^a. Another patient with the phenotype Le(a−b+) has a positive antibody screen; however, a panel reveals no conclusive antibody. Should anti-Le^a be considered as a possibility for the patient with the Le(a−b+) phenotype?

Anti-Le^a should be considered as a possible antibody Anti-Le^a may be a possible antibody, but further studies are needed Anti-Le^a is not a likely antibody because even Le^b individuals secrete some Le^a Anti-Le^a may be found in saliva but not detectable in serum

Section 4.4Testing for Antibodies

Section 4.4
Testing for Antibodies