Definition

Noun: 1. The clumping together of red blood cells: Specifically, this clumping is caused when an agglutinogen (an antigen on the red blood cell) from one individual is combined with a serum (containing antibodies) from another individual of the same species.

Usage

• Medical/Immunology Context: This term is used almost exclusively in the fields of immunology, hematology, and transfusion medicine to describe an immune reaction within a single species.
• Core Concept: It describes the specific reaction that forms the basis for determining blood types (e.g., the ABO system). The process is a key factor in ensuring safe blood transfusions.

Examples

• Noun:
  • The laboratory test demonstrated isoagglutination, confirming the blood type incompatibility between the donor and the recipient.
  • Isoagglutination of the patient's red cells with the reagent serum identified his blood group as type A.
  • The absence of isoagglutination in the cross-match test is a critical requirement before proceeding with the transfusion.

Advanced Usage

• "Isoagglutinin": The antibody present in blood serum that causes isoagglutination.
  • Anti-A and anti-B are naturally occurring isoagglutinins.
• "Isoagglutinogen": The antigen on the surface of red blood cells that induces the formation of isoagglutinins.
  • The isoagglutinogens present on red cells determine an individual's ABO blood group.

Variants and Related Words

• Agglutination (n): The broader process of cells or particles clumping together, often due to an antigen-antibody reaction. Isoagglutination is a specific type of agglutination.
• Hemagglutination (n): The clumping of red blood cells specifically. Isoagglutination is a form of hemagglutination.
• Cross-matching (n): A laboratory test performed before a blood transfusion to detect potential isoagglutination between donor and recipient blood.

Synonyms

• Intraspecies agglutination: A more descriptive synonym emphasizing the reaction occurs within the same species.
• Blood group agglutination: A common, less technical term referring to the same phenomenon in the context of blood typing.

Antonyms

• No agglutination: The absence of clumping, which is the desired result in blood compatibility testing.
• Autoagglutination (n): The clumping of an individual's own red blood cells by their own serum, which is a pathological condition.

Noun

1. agglutination of an agglutinogen of one individual by a serum from another individual of the same species