Lewis Antigens

Lewis antigens are specific sugar molecules attached to red blood cells and body fluids, influenced by certain genes. They play a role in blood group identification and can affect blood transfusions and pregnancy outcomes. These antigens are not inherent to the blood type but are acquired from other tissues, meaning their presence can vary among individuals. They also serve as attachment points for certain bacteria and viruses, impacting susceptibility to infections. Overall, Lewis antigens are important markers for blood compatibility and understanding individual immune responses.