An example of anti-LWa in a 10-month-old infant

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Immunohematology

American National Red Cross

Subject: Medical Laboratory Technology

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ISSN: 0894-203X
eISSN: 1930-3955

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VOLUME 10 , ISSUE 4 (December 1994) > List of articles

An example of anti-LWa in a 10-month-old infant

Alan Devenish

Citation Information : Immunohematology. Volume 10, Issue 4, Pages 127-129, DOI: https://doi.org/10.21307/immunohematology-2019-938

License : (Transfer of Copyright)

Published Online: 30-November-2020

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ABSTRACT

Blood samples from a 10-month-old male infant requiring transfusion were found to contain an allomtibody reacting at 37°C in saline, by indirect antiglobulin test (IAT), and with a manual polybrene technique. Preliminary results suggested anti-D and another weaker reacting antibody, but the patient had been previously transfused with only D- blood. His serum reacted more weakly by IAT against red cells treated with 0.2M dithiothreitol (DTT), and one D+, LW(a-) sample was nonreactive. The patient’s red blood cells (RBCs) typed as B, D-, LW(a-), K-, Fy(a-). Due to the age and clinical status of the child, 51Cr survival studies were not performed. One pediatric unit of D-, K-, Fy(a-) blood was transfused uneventfully; the expected increment of hemoglobin was achieved. Repeat testing 3 months later showed a weakly positive DAT, the patient’s RBCs typed as LW(a+), and anti-LWa was detected only by a two-stage papain technique. These results suggest that the patient had a transient depression of LWa with a concurrent anti-LWa.

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