Adverse transfusion reactions in patients with aplastic anaemia or myelodysplastic syndromes.

Background And Objectives: Patients with aplastic anaemia or myelodysplastic syndromes frequently receive transfusions in an attempt to correct anaemia and/or thrombocytopenia, putting them at risk of adverse transfusion reactions. The aim of this study is to evaluate the incidence and the types of adverse transfusion reactions in these patients.

Materials And Methods: Adverse transfusion reaction reported in transfused patients with aplastic anaemia or myelodysplastic syndromes from all the hospitals in the Auvergne-Rhône-Alpes region of France were extracted from the national haemovigilance database system and analysed.

Immunological Features in the Process of Blood Platelet-Induced Alloimmunisation, with a Focus on Platelet Component Transfusion.

Alloimmunisation to platelet antigens is not uncommon; a large number of females, having had pregnancies, developed antibodies to Human Leukocyte Antigen (HLA) moieties harboured on their foetuses' cells (inherited from the father(s)) that may conflict with further pregnancies and transfused Platelet Components occasionally. This is possible since platelets constitutionally express HLA class I molecules (though in copy numbers that consistently differ among individuals). Platelets also express HPA moieties that are variants of naturally expressed adhesion and aggregation molecules; HPA differences between mothers and foetuses and between donors and recipients explain alloimmune conflicts and consequences.

Acquired red blood cell alloantibodies in transfused patients of 80 years or over: a 2008-2013 national haemovigilance survey.

Background: As transfusion in the elderly patients has increased over the last decades, and with the aim of improving blood policy, post-transfusion red blood cell alloimmunisation, a delayed serological transfusion reaction, was investigated in patients 80 years old or over.

Materials And Methods: For every adverse reaction to a transfusion, a report is sent to the French haemovigilance database. All cases of red blood cell alloimmunisation reported in the haemovigilance database were collected, and an analysis was performed on those cases in transfused patients 80 years old or over.

Sensitivity of HCV RNA and HIV RNA blood screening assays.

Background: The FDA requirement for sensitivity of viral NAT methods used in blood screening is a 95-percent detection limit of 100 copies per mL, whereas the NAT screening system should have a sensitivity of at least 5000 copies per mL per individual donation. According to the Common Technical Specifications of the European Directive 98/79/EC for in vitro diagnostics, viral standard dilutions (calibrated against the WHO standard) should be tested at least 24 times for a statistically valid assessment of the 95-percent detection limit.

Study Design And Methods: Viral standard dilution panels (PeliCheck, VQC-CLB) were prepared for HCV RNA genotypes 1 and 3 and for HIV RNA genotypes B and E.