Rhpositiv
Rhpositiv, also written Rh-positive, refers to individuals whose red blood cells express the D antigen of the Rh blood group system. The presence of the D antigen distinguishes Rh-positive from Rh-negative blood groups and is routinely tested in blood typing and prenatal screening. Rhpositiv individuals comprise the majority of the population, with prevalence varying by ethnicity.
Genetics: The D antigen is encoded by the RHD gene. If the gene is present and expressed,
Clinical significance: Rh incompatibility between an Rh-negative recipient and an Rh-positive donor can cause transfusion reactions
Testing and prevalence: Serologic testing detects the D antigen; genotyping can determine RHD gene status. The
History: The Rh system was discovered in 1940 by Karl Landsteiner and Alexander S. Wiener; the name