Persons participating in a 5-day diagnostic protocol were routinely typed for ABO, Rh, MNS, Kell, Kidd, Duffy, P, Haptoglobin, phosphoglucomutase-1 (PGM-1), and acid phosphatase (AcP). The study population was composed of 164 normotensive whites, 34 normotensive blacks, 161 whites and 43 blacks with essential hypertension, and 52 whites with secondary forms of hypertension (18 atherosclerotic r...

BACKGROUND Sickle cell anemia (SCA) is an inherited hemoglobin disorder characterized by chronic anemia and occasional crises. Clinical features are variable. While some individuals are relatively stable and rarely require blood transfusion, others often require blood transfusion. Multiple blood transfusion is associated with complications including alloimmunization, infections, and iron overlo...

A family with an insertional type of chromosome rearrangement involving chromosomes 7 and 13 is reported. An interstitial deletion of a segment of chromosome 7 (7q32 leads to 34) had been inserted into the long arm of chromosome 13 at breakpoint q32. Segregation of this chromosome rearrangement gave rise to three subjects who were monosomic for the involved segment of chromosome 7. The karyotyp...

BACKGROUND & OBJECTIVES The development of alloantibodies can significantly complicate transfusion therapy and results in difficulties in cross-matching of blood. Most literature on alloimmunization is limited to multitransfused individuals, with very few studies on the general hospital patients. This study was aimed at assessing the frequency and type of unexpected red cell antibodies in the g...

BACKGROUND KELnull (K0) persons can produce clinically significant anti-KEL5 antibody after transfusion and/or pregnancy, requiring K0 blood transfusion when indicated. 37 K0 alleles have been reported in studies over different populations, but none in Amerindian-Caucasian descendants from South America. The aim of this study was to identify the molecular basis of K0 phenotype in Brazilians. ...

Abstract Background Multiple transfusions in thalassemia patients may lead to antibody production against blood group antigens and hemolytic transfusion reaction might occur. In this study, antibody screening test was performed by tube and gel methods to determine the prevalence and specificity of alloantibodies in thalassemia patients. Materials and Methods In this cross-sectional study, overa...

OBJECTIVE To assess the efficacy of managing pregnancies complicated by anti-Kell isoimmunization using the methods developed for evaluating anti-Rh-D isoimmunization. METHODS We reviewed 156 anti-Kell-positive pregnancies seen from 1959 to 1995, which were managed with serial maternal titers, amniotic fluid deltaOD450 determination, and funipuncture. Data on maternal titers, paternal phenoty...

BACKGROUND Red blood cell (RBC) alloimmunization is still an actual problem in our transfusion practice. In 2011, in addition to the regular ABO/D blood group typing, phenotyping for Rh (C, c, E, e) and Kell antigens was introduced for blood donors and patients undergoing blood transfusion. Our aim was to evaluate the impact of the extended RBC typing and donor/recipient matching on the inciden...