Transfusion of apheresis PLTs from IgA-deficient donors with anti-IgA is not associated with an increase in transfusion reactions.
BACKGROUND
Passive transfer of antibodies through transfusion has been reported to cause adverse consequences. Approximately 1 in 700 individuals of Northern European ancestry lack IgA with up to 40 percent reported as having anti-IgA. Whether these antibodies when passively transfused were associated with reactions was examined.


METHODS
Records were reviewed to identify IgA-deficient (<0.05 mg/dL detectable IgA) apheresis PLT donors with anti-IgA. Transfusion outcomes of products from these donors were compared to outcomes of control transfusions from donors who were not IgA-deficient.


RESULTS
Four IgA-deficient donors with anti-IgA donated a total of 25 apheresis PLT products transfused to 22 recipients. Of the transfused products, 1 (4.0%) was associated with fever that was classified as unrelated to transfusion. In the control group, 60 donors donated 78 apheresis PLT products transfused to 56 recipients. Among these, an allergic reaction was identified (1.3%). The reaction rates between both groups were not different whether the single event in the anti-IgA group was considered a reaction (chi-squared value 0.735, p = 0.3914) or considered unrelated to transfusion (chi-square value 0.324, p = 0.5694).


CONCLUSIONS
The transfusion of products containing anti-IgA does not appear to be associated with a greater frequency of reactions.
Department of Laboratory Medicine and Pathology, Mayo Medical School & Clinic, 200 1st Street SW, Rochester, MN 55905, USA. winters.jeffrey@mayo.edu
Jeffrey L
JL
Winters
S Breanndan
SB
Moore
Charlie
C
Sandness
Dylan V
DV
Miller
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000888:Antibodies, Anti-Idiotypic / Q000097:blood*; D001781:Blood Component Removal; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D017098:IgA Deficiency / Q000097:blood* / Q000276:immunology*; D007070:Immunoglobulin A / Q000276:immunology; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008875:Middle Aged; D017713:Platelet Transfusion / Q000009:adverse effects* / Q000706:statistics & numerical data; D012189:Retrospective Studies
D000888:Antibodies, Anti-Idiotypic; D007070:Immunoglobulin A; C049937:anti-IgA