Hemolytic Anemia Due to Infection

Hemolytic anemia due to infection is a condition where the body's red blood cells are destroyed faster than they can be made, often because of an infection. This affects the blood and immune system, leading to symptoms like fatigue, pale skin, and rapid heartbeat. The infection can cause the immune system to mistakenly attack red blood cells or directly damage them. Common infections involved include certain bacteria, viruses, and parasites. This destruction reduces the oxygen-carrying capacity of the blood, which can cause weakness and shortness of breath. The condition can vary in severity depending on the infection and the individual's health. Prompt diagnosis is important to address the underlying infection and manage anemia.

Hemolytic anemia due to infection is characterized by premature destruction of red blood cells (RBCs) triggered by infectious agents. The core pathology involves increased RBC lysis either through direct pathogen-mediated damage, immune complex formation, or activation of the complement system. Common infectious causes include Plasmodium species (malaria), Clostridium perfringens, Mycoplasma pneumoniae, and viral infections such as Epstein-Barr virus. This condition leads to a decrease in circulating RBC mass, resulting in anemia, jaundice, and reticulocytosis. The hemolysis can be intravascular or extravascular, with clinical significance including potential for severe anemia, hemoglobinuria, and secondary complications like acute kidney injury. Recognition of infection-associated hemolysis is critical for targeted antimicrobial therapy and supportive care.