Final answer:
Erythrocytes with Rho[D] on the surface indicate that a person is Rh positive (Rh+). The Rh D antigen presence is a significant factor for blood compatibility, affecting potential immune responses and conditions such as hemolytic disease of the newborn.
Step-by-step explanation:
Erythrocytes with Rho[D] on the surface are found in a person who is Rh positive (Rh+).
The presence of the Rh D antigen on erythrocytes is the key identifier for Rh positive status.
This antigen distinguishes Rh positive individuals from those who are Rh negative (Rh-), who lack this antigen on their red blood cells.
The Rh factor, particularly the D antigen, plays a crucial role in blood transfusions and pregnancy because it is involved in potential immune system responses, such as the formation of antibodies that can lead to conditions like hemolytic disease of the newborn (HDN).
About 85 percent of Americans are Rh positive.